What is the area of a trapezoid abcd with bases ab and cd , if: ab = 10 cm, bc=da=13 cm, cd=20 cm;

If you draw a perpendicular to CD from point A or point B, you will create a right triangle with one leg 5 and hypotenuse (BC or DA) 13. The other leg of this triangle is the height of the trapezoid:

... h = √(13² -5²) = 12

The area is this height multiplied by the average base length:

... Area = (12 cm)×(10 cm +20 cm )/2 = 180 cm²

false

step-by-step explanation:

whenever we assume a point on a plane then according to geometry it will definitely have 2 dimensions and if it assumed in space then it will have 3 dimensions.

irrational, cannot