Question

How do you find the angle measure of the missing angle for a quadrilateral with angle measures of 145 degrees, 85 degrees and 45 degrees?

Answer 1

The measure of missing angle is `85^@`.

Explanation:

Sum of the angles of a quadrilateral is always `360^@`. As the measures of three angles is `145^@`, `85^@` and `45^@`,

the measure of missing angle is

`360^@-145^@-85^@-45^@`

= `360^@-275^@`

= `85^@`