Question

1. Find the value of x in each of the following diagrams:

please please give this answer ​

Answer 1

$1.2x - 5 + x = 115 \\ \\ 3x = 120 \\ \\ x = 40$

$2.45 + 80 + x = 180 \\ \\ x = 180 - 125 \\ \\ x = 55$

$3.45 + 72 + x + 50 = 180 \\ \\ x = 180 - 167 \\ \\ x = 13$

Answer 2

Answer:

(i)x+2x-5=115°

3x-5°=115°

3x=115°+5°

3x=120°

x=120°/3

x=40°

(ii)45°=45°(Alternate interior angles)

x+80°+45°=180°(Angle sum property)

x+125°=180°

x=180°-125°

x=55°

(iii)A=72°+50°=122°

A+45°+x=180°(Angle sum property)

122°+45°+x=180°

167°+x=180°

x=180°-167°

x=13°