Question

Dundee Street, Crown Lane, and Charger Drive intersect to form ∠1, ∠2, ∠3, ∠4, and ∠5, as shown.

Angles 2 and 5 are the vertically opposite angles. Angles 4, 3, and 2 are supplementary angles.

Lily knows that the measure of
∠
2
is 55° and wants to find the measure of
∠
1
. Use the drop-down menus to choose the responses that make each statement true.

Angle 1 and angle 2 are
Choose...
angles.
So,
55
∘
+
m
∠
1
=

Choose...
.
Therefore,
m
∠
1
=

Choose...
.

Answer 1

Angle 1 and angle 2 are supplementary angles.
So, 55° + m∠1 = 180°.
Therefore, m∠1 = 125°.