Given triangle ABC and triangle DEF so that ∠A≅∠D, ∠B≅∠E, AB = 4, and DE = 8. we have to tell the similarity theorem or postulate that applies to prove above triangles congruent.
In ΔABC and ΔDEF
∠A=∠D (Given)
∠B=∠E (given)
Two angles are congruent
Hence, by AA similarity postulate which states that if the two corresponding angles of two triangles are congruent they are similar i.e ΔABC~ΔDEF
55 % of the circle has been shaded. 1/5 is equal to 20% and 1/4 is equal to 25%. If you add 20 to 25 you get 45% meaning 45% is not shaded. In conclusion, 55% of the circle has been shaded.