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A triangle has  vertices.

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Important Questions on 2D - 3D Shapes

MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Count the number of triangles formed in the given figure.
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Find the angles of a triangle which are in the ratio 4:3:2.
MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Each of the two equal angles of an isosceles triangle is twice the third angle. Find the angles of the triangle.
MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Draw a rough sketch of a triangle ABC. Name its sides, vertices, and angles. Draw all the medians of the triangle.
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Define triangle
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
One of the acute angles of a right triangle is 36°. find the other.
MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Count number of triangles in the following figure
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
In a ∆ABC, if ∠A = 72° and ∠B = 63°, find ∠C.
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Can an isosceles triangle be a right triangle?
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
In the given figure, DE || BC. If ∠A = 65° and ∠B° = 55, find ∠ADE.

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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle

In the given figure, find the number of triangles and name them.

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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Explain the following term:
Interior of a triangle
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
What is the measure of each angle of an equilateral triangle?
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle

Identify the altitude of the triangle ABC.

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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
Can a triangle have two right angles?
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
The acute angles of a right triangle are in the ratio 2:1. Find each of these angles.
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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle

The interior of a triangle includes its vertices. 

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Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
If one angle of a triangle is equal to the sum of the other two, show that the triangle is right-angled.
MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle
In a ∆ABC, if 2∠A=3∠B=6∠C, calculate ∠A,∠B and ∠C.
MEDIUM
Mathematics>Geometry>2D - 3D Shapes>Introduction of Triangle

Find the number of triangles in the given figure.

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