Question

in the given figures what must be value of x to prove triangle ABC is congruent to triangle DEC by SAS​

Answer 1

Answer:

x = 25°

Explanation:

(2x + 15)° = (5x - 60)°

2x + 15 = 5x - 60

15+ 60 = 5x - 2x

75 = 3x

75/3 = x

x = 25.

So the value of x must be equal to 25°

Answer 2

Answer:

x=25°

Explanation:

for conguret ∆ABC to∆DEC by SAS it is nessesry that angle A =angle D

I.e ,

2x+15=5x-60

15+60=5x-2x

3x=75

x=75/3

x=25°