geometry
posted by Blanca .
Suppose right triangle ABC has one acute angle 47º. Suppose also that right triangle DEF has an acute angle 43º. How are triangles ABC and DEF related?

A right triangle with an acute angle of 47 degrees must have a second acute angle of 43 degrees. Therefore the two triangles are similar. They both have the same angles of 90, 47 and 43 degrees.

Suppose right triangle ABC has one acute angle 47º. Suppose also that right triangle DEF has an acute angle 43º. How are triangles ABC and DEF related?