to prove that the triangles are similar by the SAS similarity theorem, it needs to be proven that ​

Answer:It needs that the measure of angle m<I is equal to 60 degrees to prove that the triangles are similarStep-by-step explanation:we know thatThe SAS Similarity states that: If in two triangles, one pair of corresponding sides are proportional and the included angles are equal then the two triangles are similar.soIn this problemThe corresponding sides are proportional, because[tex]\frac{40}{20}=\frac{20}{10}\\ \\2=2[/tex]It needs to be proven that the included angles are equal in both trianglesThe measure of angle m<I must be equal to 60 degrees to prove that the triangles are similar