I need help asap. I will give 15 points to who ever helps me with The problem is down below

Mathematics

1 answer:

Sindrei [870]3 years ago

4 0

Answer:

Choice D. Total surface area = 8 + 8 + 4 + 4 + 2 + 2

Step-by-step explanation:

You want surface area of this rectangular prism

If you notice there are 6 faces of this prism

two faces with area 1*2 = 2

two faces with area 4*1 = 4

two faces with area 4*2 = 8

Total surface area = 8 + 8 + 4 + 4 + 2 + 2

You might be interested in

Can someone help please

Alik [6]

Answer:

Step-by-step explanation:

base + 2(legs) = 56 (2 legs are the same because it's isosceles)

x + 2(5x - 5) = 56

x + 10x - 10 = 56

11x -10 = 56

11x = 66

x = 6

5 0

3 years ago

Please Help!

alisha [4.7K]

Diagonal of the parallelogram divides the parallelogram in to two equal areas.

So area of parallelogram = 2(area of triangle)

According to the given diagram,

AB= 8, AD = 5 and BD = 11

So according to the Heron's formula,

Area of triangle = $\sqrt{s(s-a)(s-b)(s-c)}\\\\where,\\ s =\frac{a + b + c }{2}$

and a, b and c are the three sides of the triangle

Area of triangle ABD = $s=\frac{8 + 5 + 11}{2} \\\\s = \frac{24}{2}\\\\s = 12Area of triangle ABD = \sqrt{12(12 - 8) (12 - 5) (12 - 11)}\\\\Area of triangle ABD = \sqrt{12(4) (7) (1)}\\\\Area of triangle ABD = \sqrt{336}\\\\Area of triangle ABD = 18.33$