Answer:
it is 7
Step-by-step explanation:
Answer:
uh 52
Step-by-step explanation:
I say 52 cause like it sounds about reasonable
Remember that all the interior angles of a triangle add up to 180°.
The picture tells us two of the angles,

which is 40° and

which is also 40°.
Subtract the measurement of these two angles from 180° to find the measure of the third angle,

:
180° - 40° - 40° = 100°.
The measure of angle RST is 100°.
-------
Answer: 100°