the parallel sides of a trapezium are 20 cm and 10 cm. Its non parallel are both equal each being 13cm. Find the area of the trapezium.​

Step-by-step explanation:

a = 20 cm

b = 10 cm

c = 13 cm

Distance between the parallel sides is found using the Pythagoras theorem.

Area of a trapezium is given by

The area of the trapezium is

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.