Answer:
50⁰
Step-by-step explanation:
we know that sum of angles in a triangle is equal to 180⁰
on adding the angles we get
x⁰+x⁰+20⁰+x⁰+70⁰=180⁰
3x⁰+90⁰=180⁰
3x⁰=90⁰
x⁰=30⁰
Now angle R=x+20=30+20=50⁰
Answer is 50⁰
I HOPE IT HELPED YOU
50 degrees
