Question

Help please! thank you xoxo!
2 math problems

Answer 1

3. x = 45

4. 73°

Explanation:

3. The sum of the interior angles of a pentagon is 540° so

90° + 112° + 2x + (2x + 10) + 148° = 540°

Simplifying this, we get

4x + 360 = 540 => 4x = 180 or x = 45

4. The sum of the interior angles of a pentagon is 540° which means that the unknown interior angle is 107°. This angle is a supplementary angle to
`\angle{A}` so
`\angle{A}` is

180° - 107° = 73°.