Question

need help maths reply with method pls​

Answer 1

Step-by-step explanation:

A) Let x be one of the angle

second angle = x+10

therefore, by definition

x+x+10 = 90 => 2x = 80 => x = 40

therefore, first angle = 40

second angle = 40+10 => 50

B)

1)

Angle p + angle q + angle r = 180

let angle Q be x

since, PQ = PR

therefore , angle R = x

therefore,

30+2x = 180 => x = 75

therefore, Angle Q and angle R = 75

2) Let x be common factor,

therefore,

2x+3x+5x = 180 => x = 18

First angle = 36°

Second angle = 54°

Third angle = 90°

Therefore, it is a right angled triangle.

3) Angle b + angle a = angle Acd

let angle a be x

65+x = 115 => x = 50°

Therefore angle a = 50°