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Anna [14]
2 years ago
13

I NEED HELP !! PICTURE IS UP THERE ^

Mathematics
1 answer:
Fynjy0 [20]2 years ago
4 0

Answer:

\angle 1 = 99^\circ

\angle 3 = 99^\circ

\angle 4 = 81^\circ

Step-by-step explanation:

Given

\angle 2 = 81^\circ

Required

Determine: \angle 1 . \angle 3 , \angle 4

Solving for \angle 1, we have:

\angle 2 + \angle 1 = 180^\circ --- angle on a straight line

So, we have:

\angle 1 = 180^\circ-\angle 2

\angle 1 = 180^\circ-81^\circ

\angle 1 = 99^\circ

To solve for \angle 3, \angle 4, we have:

\angle 3 = \angle 1

\angle 4 = \angle 2 --- Vertically opposite angles

So:

\angle 4 = 81^\circ

\angle 3 = 99^\circ

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