I was wondering if anyone can help me to figure out the correct angle cuts I need to make to build a frame using 1x4. I have a mitre saw, jig saw and circular saw. the base of my triangle has 29 inches. there`s one right angle (90 degrees) which is at the left of my triangle. the vertical length is 27 inches. how do I cut my pieces of 1x4 to make this triangle.