 Find the area of the triangle. 1 m
The side of an equilateral triangle is 24k cm long. Find its perimeter.
1 m
PSLE
The square ABCD is made up of 4 smaller squares.
1. What is the ratio of the area of the shaded part to the area of the unshaded part?
2. If the length of the square ABCD is 4 cm, what is the area of the shaded part? 2 m
The figure shows a cube. The total length of all the edges of the cube is 156 cm. Find the area of the shaded face. 2 m
John used 3 rubber bands to form the sides of triangle ABC where AB = 8 cm, BC = x cm and AC = 2x cm. Bob stretches two of the elastic bands and enlarges triangle ABC. The sides BC and AC were stretched to 2 times its original length. What is the perimeter of the stretched triangle ABC?
2 m
The perimeter of an isosceles triangle is (6k + 21) cm. The longest side is (2k + 7) cm. Find the length of one of the equal sides.
2 m
PSLE
Andy had 1.4 m of wire. He used some of it to make the figure as shown.
1. How much of the wire did Andy use to make the figure? Leave your answer in the simplest form in terms of x.
2. If x = 15, how much of the wire was not used to make the figure? Leave your answer in metres.
2 m
PSLE
In the figure not drawn to scale, ACEG and BDFH are squares. AB, CD, EF and GH are of the same length. The ratio of AB : BC is 3 : 1.
1. What fraction of square ACEG is shaded?
2. If the length of the square is 96 cm, find the unshaded area in cm2. 3 m
The figure is made up of two squares and a triangle. The ratio of the area of Triangle X to that of Square Z is 11 : 1. The ratio of the shaded area to that of the unshaded area is 1 : 3. If the difference between areas of Triangle X and Square Y is 464 cm2, what is the area of Square Z? 3 m
Each figure is made up of a number of identical sticks of 1-cm length.
1. Find the perimeter of Figure 50.
2. Find the number of sticks in Figure 100.
3. Given that a figure has a perimeter, P, of 254 cm, find the number of squares in this figure. 3 m