Planimetrics - practice for 12 year olds - page 3 of 49
Number of problems found: 961
- A rectangle 13
A rectangle measures 2 1/2 meters by 1 3/4 meters. What is its area? - Nisha
Nisha likes to make small rectangular paintings of cats. One of her paintings has an area of 33cm squared and a width of 7 1/2 centimeters. What is the height of this painting? - Linda
Linda gave her sister 2/5 of her money, spent 1/3, and saved the remainder. If Linda saved $28.00, how much money did she have at first? - An electorate
In an electorate, 3/4 th of the voters are Tamils. Of the remaining 2/3 rd are Muslims, and the others are Sinhalese. If the number of Sinhalese in that electorate is 587, find the number of voters in that electorate.
- The bedroom
The area of the rectangular bedroom is 136 5/8 square feet. If its width is 12 3/4 feet, find its length in simplest form. - Angles sum 180
In triangle ABC, the measure of ∠A is 30°, and the measure of ∠C is 90°. What is the measure of ∠B? - Consecutive Interior Angles
PQRS is a trapezium in which PQ is parallel to SR and ∠P = 130 ̊, ∠Q = 110 ̊. Find the remaining angles. - Three 237
Three vertices of a rectangle have the coordinates (5, 3), (5, -1), (-1, -1). What are the coordinates of the fourth vertex of the rectangle? - Two sides 2
Two sides of a triangle are 12 and 15, and the perimeter is 40. Find the other side.
- A biker
A biker traveled from city A to city B via city C with a uniform speed of 52 km/h. He then returned directly to city A with a uniform speed of 89 km/h. Find, in minutes, the total time of his whole journey to two decimal places. City distance A from B is - Calculate 83265
Calculate the area of a right-angled triangle ABC with a=15 cm, b=1.7 dm. - Tablecloth 81847
A square tablecloth measures 80 cm so that it protrudes 33 cm on the sides; calculate how big it is. - Half-circles 81731
A skier skis down a black slope. He makes a total of 31 half-circles while going down the hill. The radius of one semicircle is 4m. What distance did he travel? - Calculate 81590
Calculate the central angle if r = 72 cm and the arc length is 12.4 cm.
- Process 81358
Teo went around the pool twice. He took 160 steps in the process. He took 25 steps along the length. How much area does the pool take up, and how long is Tro's stride? 0.5m? - Rectangle 80701
One side of the rectangle has length a=9/5 cm, and the length of side b is 7/10 cm greater than the length of side a. Calculate the perimeter and area of the rectangle. - Three-fifths 80366
Calculate in cm the perimeter of a triangle with sides a, b, and c. If a is two-thirds of side b, c is three-fifths side b; b=15 cm. - The length 14
The length of the rectangle is 6cm, and the perimeter of the rectangle is 20 cm. Find the rectangle's breadth. Find the area of the rectangle. - A farmer 6
A farmer made a square chicken coop of 6 1/3m. Determine the perimeter of the chicken coop. (Recall: perimeter =add all sides)
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