Answer:
80
Step-by-step explanation:
The sides of a triangle always add up to 180. 80+20+?=180
Drawing a ray with one endpoint
Answer:
x=16
Step-by-step explanation:
K + M =180. (opposite angles of a cyclic quadrilateral are supplementary )
7x+21+47=180
7x+68=180
7x=180-68
7x=112
7x/7=112/7
x=16
Answer: 2x divided by 4x+16