Answer:
Triangle: a plane figure with three straight sides and three angles.
First, we'll need the area of a single triangle
then we'll multiply that by 3 to get our answer
to find the are of a triangle, we multiply height times base then divide that by 2
so.. 5 x 10 = 50; 50/2 = 25
if 25 = one triangle
then 25 x 3 = 75 = three triangles
answer - 75 sq. in.
Our missing number we are solving for is X.
We are told x will equal 2x (number doubled) plus -16.
x = 2x + -16 We want to move the smaller variable to the right to sit with the larger one and move the -16 to the left by subtracting it from both sides. Remember that subtracting a negative is the same as adding it. So essentially we add 16 to both sides.
16 = 2x - x Combine the variables
16 = x or x = 16
I chose to put the variable on the left in this problem to avoid having a -x on the left side. It doesn't matter which side the variable is on to solve, but when you state it - we usually say x = 16.
As it is a rectangle....
therefore Area of rectangle
LB
13*10. (here star means multiplication)
130
perimeter of rectangle
2(l+b)
2(13+10)
2*23
46m
