Answer:
Step-by-step explanation:
<u>Area of the regular polygon:</u>
- A = Pa, where P- perimeter, a- apothem
a. <u>Side length is:</u>
- s/2 = √13²-12² = √25 = 5
- s = 10 units
<u>Perimeter is:</u>
b. <u>Area is:</u>
The true answer is A. all parallelograms are rectangles
Answer:
250%
Step-by-step explanation:
Where: 80 is the old value and 280 is the new value.
Percent change = [(New - Old ) / |Old|] x 100%
Percent change = [(280 - 80) / |80|] x 100 = [(200) / 80] x 100 = 250 % (decrease)
In this case we have a positive change (increase) of 250 percent because the new value is smaller than the old value.
Notice the picture below
due to equal sides on each scalene triangle, the angle bisector cuts the horizontal in half
thus, use the pythagorean theorem to get the "b" or opposite side
also notice, that "b" is also the altitude or height "h"
what's the area? well, area of a triangle is 1/2 bh
get the area of each triangle and sum them up, that's the area of the kite
Answer:
x - 2 => x = 2
x² + 3ax - 2a
=> 2² + 3 × a × 2 - 2 × a
=> 4 + 6a - 2a
=> 4 + 4a
=> 4 ( 1 + a )
★ 1 + a = 0
a = -1