Answer:
12.71in
step explanation:
The Length of an arc given is expressed as;
A = theta/360 * 2πr
10 = 45/360 * 2 * 3.14r
10 = 1/8 * 6.28r
Cross multiply
10 * 8 = 6.28r
80 = 6.28r
r = 80/6.28
r = 12.74in
Hence the radius is 12.71in
Because all the angles in a triangle must add up to 180 degrees, we can set the sum of the angles to 180
(4W-6) +W +W=180
6W-6=180
6W=186
W=31
Hope this helps!
