Because it is an isosceles triangle, the two base angles have to be the same, so
36°+36°=72°
angles in all triangles add up to 180°, so
180°-72°=108°
unknown=108°
Answer:
B1= -7
B2=-9
400 times bigger
Step-by-step explanation:
Answer:

Step-by-step explanation:

Hope this will help you :))