Pls help on area of rectangle & triangles quick check

Sure, I'd be happy to help with that.

The formula for finding the area of a rectangle is:
Area = length x width

For example, if a rectangle has a length of 5 units and a width of 3 units, the area would be:
Area = 5 x 3 = 15 square units

The formula for finding the area of a triangle is:
Area = 1/2 x base x height

For example, if a triangle has a base of 4 units and a height of 6 units, the area would be:
Area = 1/2 x 4 x 6 = 12 square units

I hope this helps! Let me know if you have any other questions.