Answer:
Step-by-step explanation:
21/7=3
5*3=15 width
3*3=9 height
Posting screenshot of my answer in the linked question in case it gets deleted.
The answer is C
short explanation: the two triangles are congruent so that would make BD equal to AC and if AC is 6 then BD is 6
hope this helps
The answer is D). A perfect square
b2 - 4ac > 0
Roots are real, unequal and rational.