She made an error in the STEP 1
she shouldnt multiply the numbers
Answer:
c and d
Step-by-step explanation:
using the two angles in the triangle, 1 and 2, it can be 180- the sum of angles 1 and 2, which is c. using angle 4, it can also be 180 - the equation for angle 4
1) 0.4
2)0.875
i dont know the 3 and 4 one
You will get r= 21/12 but you have to simplify to get R=7/4 or R=1.75
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