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use protractor, or divide isosceles triangle into two right triangles, and use trigonometric functions to find the angles individually (ONLY IF YOU HAVE ALL SIDE LENGTHS CAN YOU DO THIS)

Q: How calculate angle in isosceles triangle?

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there are three angles on an isosceles triangle

-- An isosceles triangle has two equal sides. -- An isosceles triangle has two equal angles. -- An isosceles triangle has two equal interior-angle bisectors. -- The bisector of the vertex angle of an isosceles triangle is also the perpendicular bisector of the triangle's base.

The base angles of an isosceles triangle are congruent. The vertex angle of an isosceles triangle is not necessarily congruent to the base angles.

A right angled isosceles triangle!

A right angle triangle is a triangle with an angle 90 degrees. An isosceles triangle is a triangle with two or more equal angles/ length of lines. An equilateral triangle can also be an isosceles triangle.

Related questions

A triangle that has one right angle and is isosceles is called an isosceles right triangle.

An isosceles triangle has two equal sides and two equal angles. A right triangle is any triangle with one angle that is a right angle. A right triangle could also be an isosceles triangle, but an isosceles triangle will not always have a right angle.

An isosceles triangle may have a right angle, but a right angle is not a requirement of all isosceles triangles.

You can't calculate any angle if all you know is one side of the triangle.

An isosceles triangle has two equal sides and two equal angles. A right triangle is any triangle with one angle that is a right angle. A right triangle could also be an isosceles triangle, but an isosceles triangle will not always have a right angle.

An isosceles triangle can have a 90 degree angle, but doesn't necessarily. Similarly, a right triangle can be an isosceles triangle, but isn't necessarily.

there are three angles on an isosceles triangle

The third angle of an isosceles triangle doesn't have a name.

Yes, a right triangle an be an isosceles triangle. The triangle will will have a 90 degree angle and two 45 degree angles. This is the only way a right angle triangle can also be an isosceles triangle.

-- An isosceles triangle has two equal sides. -- An isosceles triangle has two equal angles. -- An isosceles triangle has two equal interior-angle bisectors. -- The bisector of the vertex angle of an isosceles triangle is also the perpendicular bisector of the triangle's base.

The base angles of an isosceles triangle are congruent. The vertex angle of an isosceles triangle is not necessarily congruent to the base angles.

Either an isosceles or a scalene triangle can have one right angle.