Question

In the diagram above, <1=40. Find the measure of <4
<4 = [???]

Answer 1

40 degrees.

Explanation:

< 4 = < 1 = 40 degrees

( as they are vertical ( opposite) angles)

( US = vertical, UK = opposite)

Answer 2

m∠4 = 40°

Explanation:

we notice that ∠1 and ∠4 are two Vertically opposite angles which means they are equal to each other then m∠4 = m∠1 = 40°