- 7th
- Maths
- The Triangle and Its Properties
- Exterior Angle of a Triangle

The Triangle and Its Properties

Maths

Class 7

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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$AP$ bisects angle $A$`

$BP$ bisects angle $B$ then

$∠DAP+∠CBP=2∠APB$

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

Then angles $x_{∘},y_{∘}andz_{∘}$

in ascending order of their values is written as,

$x_{∘}<y_{∘}<z_{∘}$

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

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(i) $AE$ is the __________.

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AB = AC

$∠A=48$ and

$∠ACD=18_{∘}$.

hence, AB = CD.

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