Measure area using counting with squares as a strategy | Starter Quiz | Oak National Academy

Put the missing words from the sentence into the correct order: ___ is the measurement of a ___ surface. It measures a ___ space.

• flat

• area

• 2D

Answer explanation

You have correctly defined area.

Which of these shapes is most commonly used for measuring the area of a 2D space, because it tessellates so well and has right angles?

• circle

• square

• triangle

• hexagon

Answer explanation

Squares are the standard shape used to measure area.

Which of the following shapes are rectilinear?

• a

• b

• c

• d

Answer explanation

All of those shapes are rectilinear; they consist of straight sides and only right angles.

What is the most efficient way of finding the area of this rectangle?

• Count all of the individual squares.

• Count the squares in one column and then count in steps of that number.

• Count the squares in one row and then count in steps of that number.

Answer explanation

Any of these methods would have given the area of the rectangle, but you chose the most efficient one: 5, 10, 15.

I am counting in threes: 3, 6, 9... Tick all of the numbers that would appear in the sequence when counting in threes.

• 11

• 30

• 13

• 21

• 18

Answer explanation

Counting in various different steps is one possible strategy when working out the area of a rectangle.

Which of these would make one whole?

• One half + one half

• One quarter + one quarter

• One quarter + three quarters

• One half + one quarter

• One third + two thirds

Answer explanation

Fractions of squares can sometimes go together to make a whole square, so knowing pairs of fractions that total one whole is useful knowledge.