Answer:
14
Step-by-step explanation:
Answer:
This is because angles inscribed in a semicircles are 90 degrees (BCA)
The tanget of that circle is also a 90 degree angle to the diameter (ABD)
Therefore they're both 90 degrees
Answer:
Where's exercise 11
Step-by-step explanation:
Answer:
Complementary angles are 90°
Supplementary angles are 180°
Vertical angles are congruent