Answer:
2520cm²
Step-by-step explanation:
Surface area = sum of the area of all the bases.
Area of bottom base = 28 * 30 = 840
Area of right base = 25 * 30 = 750
Area of left base = 17 * 30 = 510
Area of two triangles = ( 15 * 28 ) / 2 = 210 * 2 = 420
Then add all the areas together to find surface area
Surface area = 840 + 750 + 510 + 420 = 2520cm²
Relevant Formulas:
Area of a rectangle = length * width. This formula was used to find the area of the bottom base, the right base and the left base
Area of a triangle = ( height * base length ) / 2 . This formula was used to find the area of the sides which are triangles.
Answer:
x=100
Step-by-step explanation:
<u>So the equation to find the sum of interior angles is 
, with n = number of sides.</u> In this case, this is an octagon (8 sided polygon), so plug in 8 into the equation to solve:
<u>The sum of the interior angles is 1080°</u>
Answer:
1/2
Step-by-step explanation:
The x-intercept is a point on the graph that is located on any point of x but must have a y-value of 0. To find the x-intercept, we must set y in the given equation equal to 0.
8x + 2y = 4
8x + 2(0) = 4
8x = 4
x = 4/8
x = 1/2
