Geometry and angle theorems

Advanced Math 5 · Unit 11 · angle-theorems-triangles

angle-theorems-triangles

Name ______________________________Date ______________

1.
Two angles sit side by side on a straight line. One of them is $48^\circ$ . What is the other angle, in degrees?
Answer: ______________
2.
Two straight lines cross at point $P$ . One of the four angles at $P$ is $35^\circ$ . A third line cuts the two lines at $Q$ and $R$ , making triangle $PQR$ , and the triangle's angle at $P$ is vertically opposite the $35^\circ$ angle. The triangle's angle at $Q$ is $60^\circ$ . What is the triangle's angle at $R$ , in degrees?
Answer: ______________
3.
In triangle $ABC$ , $\angle A = 50^\circ$ and $\angle B = 60^\circ$ . Side $BC$ is extended past $C$ to a point $D$ . What is $\angle ACD$ ?
1. (A)
  $110^\circ$
2. (B)
  $70^\circ$
3. (C)
  $130^\circ$
4. (D)
  $100^\circ$