And dont give me the wrong answer

answer:

c, 200cm^2

step-by-step explanation:

let's first find the area of the triangular faces.

the formula for area of a triangle is:

,

where a is area, b is base, and h is height.

let's fill in the equation with values from the triangle in the picture, and then simplify.

now we know the area of the triangle. we know that there are two triangles, so we can multiply the area by two to get the total area of both triangles.

12*2=24

now let's work on the area of the rectangles. two of them have dimensions 5 by 11, and one is 6 by 11. the formula to find the area of a rectangle is

,

where a is area, l is length, and w is width. let's replace these values with those of the 5*11 triangle:

we can multiply this by two, as there are two 5*11 triangles:

55*2=110

now let's use the same method to find the area of the 6*11 triangle:

now we have three area values; 24 for the triangles, 110 for two of the rectangles, and 66 for the base rectangle. we can add all these values for the total area:

24+110+66=200

the answer is 200cm^2, or option c.

42.4

step-by-step explanation:

convert to decimal