ABC is a right-angled triangle in which A = 90° and AB = AC. Find B and C.

Ncert solutions class 9 chapter 7-15

Solution

Given

ABC is a right-angled triangle in which ∠A = 90° and AB = AC.

Find out

∠B=? and ∠C?

In ∆ABC,

AB=AC

∴∠B=∠C                           

∠A+∠B+∠C=180°            

90°+∠B+∠B=180°

2∠B=180°-90°

∠B=(90°)/2=45°

Answer

Therefore, ∠B=45° and ∠C =45°

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