Planimetrics - practice for 12 year olds - page 41 of 48
Number of problems found: 956
- Triangle angles
The angles α, β, γ in triangle ABC are in the ratio 6:2:6. Calculate the size of angles. - Two gardeners
The garden with an area of 81 square meters was divided by two gardeners in a ratio of 4:5. How much did the second gardener get more first? - Magnification 7927
The photo has 6cm and 9cm dimensions and should be enlarged 8: 3. What will be the dimensions after magnification? - Smallest internal angle
Calculate what size has the smallest internal angle of the triangle if values of angles α:β:γ = 3:4:8
- Magnification of the square
If we increase the square side, increase the area of the 70 %. About what percentage was increased on its side? - Calculate 82878
Calculate in degrees the size of the acute angle made by the hands of the clock at half past six. - Chocolate
How many times do we have to break a chocolate bar composed of 10 × 12 pieces to get the 120 parts? - Area of rectangle
How many times will we increase the area of the rectangle if we increase twice the length and at the same time we decrease the width by half? - Equilateral triangle
Calculate the side of an equilateral triangle if its area is 886 mm².
- XY triangle
Determine the area of a triangle given by line 7x+8y-69=0 and coordinate axes x and y. - Garden
The square garden area is 2/9 of triangle garden with sides 160 m, 100 m, and 100 m. How many meters of fencing need to fence a square garden? - It is rectangular?
The size of two of the angles in a triangle is α=110°, β=40°. Is it a right triangle? - Determine 8183
Determine the length of the rectangle if the width is 28cm in a ratio of 7:4 (d: s). - Right triangle - leg
Calculate the nearest tenth cm leg length in the right-angled triangle with hypotenuse length 9 cm and 7 cm long leg.
- Trapezium zoom
How many times increase the area of the trapezoid if all sides and altitude increase 5 times? - Rectangular 56801
We are to create a square in the shape of a rectangle with an area of 288 m² (square) so that the sides are whole numbers. What are all the dimensions of the rectangular box we can make? How many is the solution? - Similarity
ABC is a triangle wherein a = 4 cm, b = 6 cm, c = 8 cm. Is it similar to the triangle DEF: d = 3 cm, e = 4.5 cm, f = 6 cm? If so, determine the ratio of similarity. - Tiles
The room has dimensions of 12 m and 5.6 m. Determine the number of square tiles and their largest possible size to cover the room's floor. - Ratio of sides 2
The ratio of the side lengths of one square to another is 1:2. Find the ratio of the area of the two squares.
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