Answer:
A is the answer
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
I learned this
I know this because, (-1, -3) & (1,-3) are both on the x-axis if you locate them on a graph.
Hope this helped!
since triangles are similar
4/x = 7x/7
=》 4/x = x
=》x^2 = 4
=》 x = 2
for right triangles a^2 = b^2+c^2
DF^2 = 7^2+2^2 = 53
=》 DF = 7.28
perimeter of DEF = 7 +2+7.28 = 16.28
