16x2=32
21x2=42
32+42=54
the perimeter is 54
Notice below the picture
the one on the left-hand-side, is the 30-60-90 rule
those are the ratios, for 16), the hypotenuse (slanted side), is 4
for the ratios, that means that 4 = 2x, if you solve that for "x", that simply means "x" is 2
now, just use that value you found for "x" from the hypotenuse ratio, and use it to get the other two sides
what's the perimeter? all three sides added together
for 17)
Absolute value means the distance from 0.
|-0.45| =0.45
|-0.0045|=0.0045
0.45>0.0045
So
|-0.45|>|-0.0045|
Answer:
the answer is d. ASA
BAC is congruent to DAC because its an angle bisector
AC is congruent to AC by the reflexive property of congruence
BCA is congruent to DCA because its a perpendicular bisector
Just by adding both of these, pens and also pencils, these actually both signify the same word, "pencils".
We do . . . .

(
93) <em>should </em>be your correct answer!