Question

2a) Determine the unknown angle x.

Answer 1

80

Explanation:

60+40=100. 180-100=80

Answer 2

x = 80°

Explanation:

Given interior angles,

→ 60°

→ 40°

Now we have to,

→ Find the required value of x.

We know that,

→ Sum of interior angles in triangle is 180°.

Formula we use,

→ <A + <B + <C = 180°

Forming the equation,

→ x + 60° + 40° = 180°

Then the value of x will be,

→ x + 60° + 40° = 180°

→ x + 100° = 180°

→ x = 180° - 100°

→ [ x = 80° ]

Hence, the value of x is 80°.