# Triangle - 6th grade (11y) - math problems

- It is rectangular?

Size of two of the angles in a triangle are: α=110°, β=40°. Is it a right triangle? - Similarity

Are two right triangles similar to each other if the first one has a acute angle 70° and second one has acute angle 20°? - Triangle

Can be rectangular triangle equilateral? - Triangles

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. - 3-bracket

May be the largest angle in the triangle less than 20°? - Isosceles triangle

Calculate the perimeter of isosceles triangle with arm length 26 cm and base length of 21 cm. - Angles

The triangle is one outer angle 158°54' and one internal angle 148°. Calculate the other internal angles of a triangle. - Juice box

The juice box has a volume of 200ml with its base is an isosceles triangle with sides a = 4,5cm and a height of 3,4cm. How tall is the box? - Triangle

Prove whether you can construct a triangle ABC, if a=9 cm, b=6 cm, c=10 cm. - Triangle P2

Can triangle have two right angles? - 3-bracket 2

May be the smallest angle in the triangle greater than 40°? - 7 triangle

The triangle area is 26.7 cm^{2}. Determine the side length l if appropriate height h_{l}= 45.3 cm. - 3-bracket 3

Two angles in a triangle are 90° and 60°. Has triangle at least two equal sides? - Triangle

For how many integer values of x can 16, 15 and x be the lengths of the sides of triangle? - Octagon from rectangle

From tablecloth rectangular shape with dimensions of 4 dm and 8 dm we cuts down the corners in the shape of isosceles triangles. It thus formed an octagon with area 26 dm^{2}. How many dm^{2}we cuts down? - Midpoints

Triangle whose sides are midpoints of sides of triangle ABC has a perimeter 45. How long is perimeter of triangle ABC? - Area of RT 2

Calculate the area of right triangle whose legs have a length 5.8 cm and 5.8 cm. - 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. - QuizQ

An isosceles triangle has two sides of length 7 km and 39 km. How long is a third side? - Triangle

Determine if it is possible to construct a triangle with sides 28 31 34 by calculation.

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See also our trigonometric triangle calculator. See also more information on Wikipedia.