Question

B) Solve any four of the following. 1) If ∆ABC – ∆DEF and angleA = 45°, angleE = 87° then find angleC ?​

Answer 1

∆ABC ≈ ∆DEF

LA = LD

LB = LE. (CPST)

LC = LF

180 - (45+87) = LC

180 - 132 = LC

48° = LC

Answer 2

Step-by-step explanation:

Let angle B be x° and angle C bex°

we known that the sum of all angle is 180°

So,angle A +angle B+ angle C =180°

=45°+x°+x° = 180°

= 2x=180°-45°

= x=135÷2

x=67.5° hence angle C is 67.5°