Answer:
A=90°,B=90°,C=90°,D=90°
Step-by-step explanation:
all of the numbers A-D add up to 360°
Answer:
B
Step-by-step explanation:
540 is the sum of all angles in a pentagon
The ANGLE STP is 180-50 = 130
540 - 130 is 410
Answer:
C: 40 degrees
Step-by-step explanation:
50+2y+y+10=180
60+3y=180
3y=120
y=40