Circumference: Verifying whether or not the formula is applicable

Increasing a specific element by addition of.....or multiplication by.......Using Pythagoras' theoremSubtraction or addition to a larger shapeA shape consisting of several shapes (requiring the same formula)Using variablesCalculating parts of the circleIdentifying and defining elementsUsing additional geometric shapesWorded problemsIdentify the greater valueFinding Area based off Perimeter and Vice VersaCalculate The Missing Side based on the formulaApplying the formula
Question 1

O is the center of the circle.

AB = 15

Is it possible to work out its circumference?

OOOBBBAAA15

Question 2

Look at the circle in the figure.

Is it possible to calculate its circumference?

222

Question 3

Look at the circle in the figure.

Is it possible to find its circumference?

777

Examples with solutions for Circumference: Verifying whether or not the formula is applicable

Exercise #1

O is the center of the circle.

AB = 15

Is it possible to work out its circumference?

OOOBBBAAA15

Video Solution

Answer

Yes, 15π 15\pi cm

Exercise #2

Look at the circle in the figure.

Is it possible to calculate its circumference?

222

Video Solution

Answer

It is not possible to calculate.

Exercise #3

Look at the circle in the figure.

Is it possible to find its circumference?

777

Video Solution

Answer

It is not possible.