Answer:
21 x 21 = 441
Step-by-step explanation:
Whenever there is an exponent that is the many times you multiply the base by itself to.
ans: number line
the ans is number
The answer is SSS congruency.
AB=CD (given)
BC=DA (given)
AC=AC (common side)
∴ΔADC≅ΔABC
Please mark brainliest if this helps!
I attatched an image, sorry for the bad handwriting.
