Triangle - 7th grade (12y) - math problems
Number of problems found: 197
- Is right triangle
One angle of the triangle is 36° and the remaining two are in the ratio 3:5. Determine whether triangle is a rectangular triangle.
Can an equilateral triangle have a right angle?
- 3-bracket 3
Two angles in a triangle are 90° and 60°. Has triangle at least two equal sides?
- It is rectangular?
Size of two of the angles in a triangle are: α=110°, β=40°. Is it a right triangle?
For how many integer values of x can 16, 15 and x be the lengths of the sides of triangle?
- Is right triangle or not
If right triangle ABC, have sides a=13, b=11.5, c=22.5. Find area.
- Isosceles triangle
The circumference of the isosceles triangle is 32.5 dm. Base length is 153 cm. How long is the leg of this triangle?
- Right triangle
Right triangle ABC with side a = 19 and the area S = 95. Calculate the length of the remaining sides.
- Is right?
Is a triangle with sides 51, 56, and 77 right triangle?
- Inner angles
The magnitude of the internal angle at the main vertex C of the isosceles triangle ABC is 72°. The line p, parallel to the base of this triangle, divides the triangle into a trapezoid and a smaller triangle. How big are the inner angles of the trapezoid?
- Area of a triangle
What is the area of a triangle that has the base 4 1/4 and the height of 3 3/3?
Triangle whose sides are midpoints of sides of triangle ABC has a perimeter 45. How long is perimeter of triangle ABC?
- Angles in triangle
Calculate the alpha angle in the triangle if beta is 61 degrees and 98 gamma degrees.
- EQL triangle
Calculate inradius and circumradius of equilateral triangle with side a=77 cm.
- Similar triangles
In the triangle DEF is DE = 21cm, EF = 14.7cm, DF = 28cm. The triangle D´E´F´ is similar to the triangle DEF. Calculate the lengths of the sides of the triangle D´E´F´ if the similarity coefficient is one-seventh.
- Triangle angles
The angles α, β, γ in triangle ABC are in the ratio 6:2:6. Calculate size of angles.
- Type of triangle
How do I find the triangle type if the angle ratio is 2:3:7 ?
Equilateral triangle with side 40 cm has the same perimeter as an isosceles triangle with arm of 45 cm. Calculate the base x of an isosceles triangle.
- Triangle radians
The size of two internal angles of a triangle ABC are α=6/18π and β=7/18π. Calculate the size of the third angle.
- XY triangle
Determine the area of a triangle given by line 7x+8y-69=0 and coordinate axes x and y.
See also our trigonometric triangle calculator. Triangle Problems. Examples for 7th grade (seventh).