Find the area of an equilateral triangle with side lengths of 12cm.

72

Step-by-step explanation:

To find the area of a equilateral triangle you must multiply the side length's of the triangle and then divide it by 2 because when you multiply the side length's it is giving you the area of a square which is 2x the triangle. That is why you divide.

72

x = -2

y = 848

step-by-step explanation:

plug in the numbers

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).