Question

Find the total area https://media.glynlyon.com/g_geo_2013/8/soltri.gif

Answer 1

What we have here is a RECTANGLE and a TRIANGLE.
The area of the rectangle is simply BASE x HEIGHT = 3 x 6 = 18.
Now for the triangle. It is equilateral, so each interior angle is 60°.
Using the area formula A = a*b*sin(C)/2, we get A = 3 x 3 x sin(60) / 2 = (9√3)/4

So the total area is 18 + (9√3)/4 = (72 + 9√3)/4

Answer 2

square inches

Answer 3

thank you! that helped a lot

Answer 4

Oh sorry, didn't realise the figure was 3D.

Answer 5

In that case you already have areas of rectangle and triangle...
For surface area, you get 3*rect + 2*triangle