Thread: Perimeter and Area

I need help finding the area and perimeter of a triangle and a rectangle. Imageshack - 86514816.jpg

I don't get how to find the area or the perimeter for the triangle.
The rectangle I found the perimeter, but I need help finding the area, if anyone can help me much appreciated, and I might need a little more help in a few...

Originally Posted by Jubbly

I need help finding the area and perimeter of a triangle and a rectangle. Imageshack - 86514816.jpg

I don't get how to find the area or the perimeter for the triangle.
The rectangle I found the perimeter, but I need help finding the area, if anyone can help me much appreciated, and I might need a little more help in a few...

To find the perimeter of each shape, add up the lengths of all the sides.


To find the area of the rectangle, you will need to use Pythagoras to find the horizontal length. Then multiply the length by the width.


To find the area of the triangle, multiply the base by the height, then divide by 2.

Originally Posted by Prove It

To find the perimeter of each shape, add up the lengths of all the sides.


To find the area of the rectangle, you will need to use Pythagoras to find the horizontal length. Then multiply the length by the width.


To find the area of the triangle, multiply the base by the height, then divide by 2.

Thank you for your quick reply! But now I'm stuck with these Imageshack - 96207146.jpg
How would you find the height for those two? the 60s are degrees.

Originally Posted by Jubbly

Thank you for your quick reply! But now I'm stuck with these Imageshack - 96207146.jpg
How would you find the height for those two? the 60s are degrees.

look up the side ratios for a 30-60-90 triangle.