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  1. 7th
  2. Maths
  3. The Triangle and Its Properties
  4. Exterior Angle of a Triangle

Exterior Angle of a Triangle

The Triangle and Its Properties
Maths
Class 7

Overview

Define an exterior angle of a triangle and identify all the exterior angles. Prove that it is equal to the sum of the interior angles on the other two arms. Apply this relationship to find unknown angles.

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Related Questions to study

Prove that a triangle which has one of the angle as 30 degree, can not have all vertices with integral coordinates. 

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In the following figure, is parallelogram.
bisects angle `
bisects angle   then 

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The diagram shows isoceles triangles. What is the sum of and .

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Find the value of exterior angle.

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In the figure; AB is the largest side and BC is the smallest side of triangle ABC.

Then angles
in ascending order of their values is written as,

If the above statement is true then mention answer as 1, else mention 0 if false




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The bisectors and of and isosceles triangle with intersect each other at a point . is produced to meet at a point . Prove that .

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IN ,  D is midpoint of
(i) is the __________.

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Measure of is:

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In the given figure , find the value of and .

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In the figure alongside,
AB = AC
and 
.
hence, AB = CD.

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