Answer: P=26cm , A=24cm
Step-by-step explanation:
This shape is just 4 triangles, so you only need to find the area of one and multiply it by 4 for the area. The formula for area of a triangle is A=1/2(b*h).
Substitute the values into this formula.
A=1/2(3*4)
Now, multiply within the parentheses.
A=1/2(12)
Next, multiply 1/2 by 12.
A=6
The area of one triangle is 6, so we multiply this by 4 to get the 4 triangles in the shape. This gives us and area of 24cm.
Next, for perimeter. The formula for perimeter of a parallelogram is P=2(a+b) (a is the side, b is the base). Let's substitute the values into the formula. Also, we add the fives to get the full length of the sides.
P=2(3+10)
Now, solve within the parentheses.
P=2(13)
Next, multiply 2 by 13.
P=26cm
Hope this helps!