Angle a is directly opposite from a 40 degree angle, so a=40. Then we can find b since the sum of the angles of all triangles is 180 and there is a right angle in there along with angle a:
Last, to find c we just notice that it is supplementary with an angle of measure 65, so:
So our angles are a=40, b=50, c=115.
<u>R, </u>b,<u> r, r, r,</u> b, <u>r, r, r, </u>b, <u>r, r, r</u>, b, <u>r</u>.
The answer is 11 red cubes were used in his pattern.
Answer: It is gvgtyhf
Step-by-step explanation: