288762
What is the area of an equilateral triangle inscribed in a circle of radius 4cm?
1 12cm\(^{\1}\)
2 \(9\sqrt{3}\text{cm}^2\)
3 \(8\sqrt{3}\text{cm}^2\)
4 \(12\sqrt{3}\text{cm}^2\)
Explanation:
\(12\sqrt{3}\text{cm}^2\) We have, Radius of given circle is = 4cm. We know that, The side of equilateral triangle is \(\text{r} = \frac{\text{s}}{\sqrt{3}}\) \(4 = \frac{\text{s}}{\sqrt{3}}\) \(\text{s} = 4\sqrt{3}\text{cm}.\) Now, Area of equilateral triangle is \(= \frac{\sqrt{3}}{4} \times \text{s}^2\) \(= \frac{\sqrt{3}}{4}\times 4\sqrt{3} \times 4\sqrt{3}\)
16. UNDERSTADNING ELEMENTARY SHAPES
288763
Say True or False. The measure of a reflex angle >180°.
1 True
2 False
Explanation:
True According to defition, reflex angle is the angle which are greater than 180° and less than 360°.
16. UNDERSTADNING ELEMENTARY SHAPES
288764
If the angle of a triangle are in the ratio of 2 : 3 : 4, find the there angles
1 40°, 60°, 80°
2 20°, 40°, 60°
3 30°, 60°, 90°
4 90°, 180°, 360°
Explanation:
40°, 60°, 80° Let the angles of the triangle be 2x, 3x, 4x. Then 2x + 3x + 4x = 180° [ Since sum of the interior angles of a triangle be 180°] or, 9x = 180°or, x = 20°. Then the angles of the triangle be 40°, 60°, 80°.
16. UNDERSTADNING ELEMENTARY SHAPES
288765
A triangle with the sides measuring 4cm 5cm and 5cm is called
1 equilateral triangle
2 isosceles triangle
3 scalene triangle
4 none
Explanation:
isosceles triangle is a triangle in which two sides are equal and one side is different. so the triangle with given sides is
288762
What is the area of an equilateral triangle inscribed in a circle of radius 4cm?
1 12cm\(^{\1}\)
2 \(9\sqrt{3}\text{cm}^2\)
3 \(8\sqrt{3}\text{cm}^2\)
4 \(12\sqrt{3}\text{cm}^2\)
Explanation:
\(12\sqrt{3}\text{cm}^2\) We have, Radius of given circle is = 4cm. We know that, The side of equilateral triangle is \(\text{r} = \frac{\text{s}}{\sqrt{3}}\) \(4 = \frac{\text{s}}{\sqrt{3}}\) \(\text{s} = 4\sqrt{3}\text{cm}.\) Now, Area of equilateral triangle is \(= \frac{\sqrt{3}}{4} \times \text{s}^2\) \(= \frac{\sqrt{3}}{4}\times 4\sqrt{3} \times 4\sqrt{3}\)
16. UNDERSTADNING ELEMENTARY SHAPES
288763
Say True or False. The measure of a reflex angle >180°.
1 True
2 False
Explanation:
True According to defition, reflex angle is the angle which are greater than 180° and less than 360°.
16. UNDERSTADNING ELEMENTARY SHAPES
288764
If the angle of a triangle are in the ratio of 2 : 3 : 4, find the there angles
1 40°, 60°, 80°
2 20°, 40°, 60°
3 30°, 60°, 90°
4 90°, 180°, 360°
Explanation:
40°, 60°, 80° Let the angles of the triangle be 2x, 3x, 4x. Then 2x + 3x + 4x = 180° [ Since sum of the interior angles of a triangle be 180°] or, 9x = 180°or, x = 20°. Then the angles of the triangle be 40°, 60°, 80°.
16. UNDERSTADNING ELEMENTARY SHAPES
288765
A triangle with the sides measuring 4cm 5cm and 5cm is called
1 equilateral triangle
2 isosceles triangle
3 scalene triangle
4 none
Explanation:
isosceles triangle is a triangle in which two sides are equal and one side is different. so the triangle with given sides is
288762
What is the area of an equilateral triangle inscribed in a circle of radius 4cm?
1 12cm\(^{\1}\)
2 \(9\sqrt{3}\text{cm}^2\)
3 \(8\sqrt{3}\text{cm}^2\)
4 \(12\sqrt{3}\text{cm}^2\)
Explanation:
\(12\sqrt{3}\text{cm}^2\) We have, Radius of given circle is = 4cm. We know that, The side of equilateral triangle is \(\text{r} = \frac{\text{s}}{\sqrt{3}}\) \(4 = \frac{\text{s}}{\sqrt{3}}\) \(\text{s} = 4\sqrt{3}\text{cm}.\) Now, Area of equilateral triangle is \(= \frac{\sqrt{3}}{4} \times \text{s}^2\) \(= \frac{\sqrt{3}}{4}\times 4\sqrt{3} \times 4\sqrt{3}\)
16. UNDERSTADNING ELEMENTARY SHAPES
288763
Say True or False. The measure of a reflex angle >180°.
1 True
2 False
Explanation:
True According to defition, reflex angle is the angle which are greater than 180° and less than 360°.
16. UNDERSTADNING ELEMENTARY SHAPES
288764
If the angle of a triangle are in the ratio of 2 : 3 : 4, find the there angles
1 40°, 60°, 80°
2 20°, 40°, 60°
3 30°, 60°, 90°
4 90°, 180°, 360°
Explanation:
40°, 60°, 80° Let the angles of the triangle be 2x, 3x, 4x. Then 2x + 3x + 4x = 180° [ Since sum of the interior angles of a triangle be 180°] or, 9x = 180°or, x = 20°. Then the angles of the triangle be 40°, 60°, 80°.
16. UNDERSTADNING ELEMENTARY SHAPES
288765
A triangle with the sides measuring 4cm 5cm and 5cm is called
1 equilateral triangle
2 isosceles triangle
3 scalene triangle
4 none
Explanation:
isosceles triangle is a triangle in which two sides are equal and one side is different. so the triangle with given sides is
288762
What is the area of an equilateral triangle inscribed in a circle of radius 4cm?
1 12cm\(^{\1}\)
2 \(9\sqrt{3}\text{cm}^2\)
3 \(8\sqrt{3}\text{cm}^2\)
4 \(12\sqrt{3}\text{cm}^2\)
Explanation:
\(12\sqrt{3}\text{cm}^2\) We have, Radius of given circle is = 4cm. We know that, The side of equilateral triangle is \(\text{r} = \frac{\text{s}}{\sqrt{3}}\) \(4 = \frac{\text{s}}{\sqrt{3}}\) \(\text{s} = 4\sqrt{3}\text{cm}.\) Now, Area of equilateral triangle is \(= \frac{\sqrt{3}}{4} \times \text{s}^2\) \(= \frac{\sqrt{3}}{4}\times 4\sqrt{3} \times 4\sqrt{3}\)
16. UNDERSTADNING ELEMENTARY SHAPES
288763
Say True or False. The measure of a reflex angle >180°.
1 True
2 False
Explanation:
True According to defition, reflex angle is the angle which are greater than 180° and less than 360°.
16. UNDERSTADNING ELEMENTARY SHAPES
288764
If the angle of a triangle are in the ratio of 2 : 3 : 4, find the there angles
1 40°, 60°, 80°
2 20°, 40°, 60°
3 30°, 60°, 90°
4 90°, 180°, 360°
Explanation:
40°, 60°, 80° Let the angles of the triangle be 2x, 3x, 4x. Then 2x + 3x + 4x = 180° [ Since sum of the interior angles of a triangle be 180°] or, 9x = 180°or, x = 20°. Then the angles of the triangle be 40°, 60°, 80°.
16. UNDERSTADNING ELEMENTARY SHAPES
288765
A triangle with the sides measuring 4cm 5cm and 5cm is called
1 equilateral triangle
2 isosceles triangle
3 scalene triangle
4 none
Explanation:
isosceles triangle is a triangle in which two sides are equal and one side is different. so the triangle with given sides is
