Question

mp3 4wca test redo
find $m\angle a$. the diagram is not to scale.
○ 73
○ 117
○ 107
○ 63

Explanation:

Step1: Calculate total interior angles

For a pentagon, total interior angles = $(5-2)\times180^\circ = 540^\circ$

Step2: Sum given interior angles

Sum = $96^\circ + 118^\circ + 104^\circ + 115^\circ = 433^\circ$

Step3: Find missing interior angle

Missing angle = $540^\circ - 433^\circ = 107^\circ$

Step4: Calculate $\angle A$ (supplementary)

$\angle A = 180^\circ - 107^\circ = 73^\circ$

Answer:

73 (Option: 73)