to meet at the third vertex of the triangle. Place compass point at point R, and draw an arc using compass opened to 8 cm, so as to cross the first arc. Label the point where these arcs cross ...

You've constructed a triangle, given the length ... 8 cm and 40°. Draw a straight 8 cm line using a pencil and ruler. Set the compass width to 7 cm. Place the compass at one end of the line ...