Question

Triangle ABC is an iscoceles right angled triangle in which < A = 90°, Find

Answer 1

Answer:

Step-by-step explanation:

GIVEN :  angle A=90

           :  ABC IS AN ISOSCELES TRIANGLE,  AB=AC  

           : ANGLE B = ANGLE C [angles opp. to equal sides are equal]

WE KNOW ,

SUM OF ALL ANGLES OF TRIANGLE=180

THEREFORE,

A+B+C=180

90+B+B=180               [B=C]

90+2B=180                

2B=180-90

2B=90

B=90/2

B=45

SINCE

C=B

C=45

Answer 2

Answer:

x = 45°

Step-by-step explanation:

a = 90°

b = x

c = x

sum of a triangle = 180°

x + x + 90° = 180°

2x + 90° = 180°

2x = 180° - 90°

2x = 90°

x = 90° ÷ 2

x = 45°