Answer:
Step-by-step explanation:the first one is 8
Second 3 3- 6
P=2*(l+w)
p=2l+2w
2w=p - 2l
w= (p-2l)/2
Answer:
It depends, Y or X have to be set up to get an actual number because you can simply plug any numbers.
Answer:
20√3 cm
Step-by-step explanation:
Altitude of an equilateral triangle splits it into 2 equal right triangles, it bisects the base and the angle opposite to the base.
<u>Let the altitude be x. Then as per Pythagorean theorem:</u>
- x² = 40² - (40/2)²
- x²= 1600 -400
- x²= 1200
- x= √1200
- x= 20√3 cm
<u>Correct choice is</u> the second one