Find the measures of the interior angles of the triangle. A 30° B 40 С

A = 110°

Step-by-step explanation:

All triangles have angles that add to a sum of 180°

That means you can simply subtract angle B and C from 180 to get angle A

180 - 30 - 40 = 110°

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

understand that i don't know the answers

will someone answer his question