Get Worksheet 4 1 Classifying Triangles Geometry Regular Answer Key

0:10 2:11 Classifying Triangles By Their Sides | Math with Mr. J - YouTube YouTube Start of suggested clip End of suggested clip Equal for number two we have a triangle with a side two feet and then a side nine feet and then theMoreEqual for number two we have a triangle with a side two feet and then a side nine feet and then the other side nine feet. So two equal sides.

An acute triangle has three angles that each measure less than 90 degrees. An equilateral triangle is a triangle in which all three sides are the same length. An obtuse triangle is a triangle with one angle that is greater than 90 degrees. A right triangle is a triangle with one 90 degree angle.

0:55 3:58 How to Name Triangles | Classify Triangles by Sides and Angles YouTube Start of suggested clip End of suggested clip An isosceles triangle is a triangle with two congruent sides or two sides of the same length. AMoreAn isosceles triangle is a triangle with two congruent sides or two sides of the same length. A scalene triangle has no congruent sides. So all of the sides are a different length.

If all three of the angles of a triangle are acute angles, then the triangle is an acute triangle. If all three angles of an acute triangle are congruent, then the triangle is an equiangular triangle. If one of the angles of a triangle is an obtuse angle, then the triangle is an obtuse triangle.

When classifying a triangle by its sides, you should look to see if any of the sides are the same length. If no sides are the same length, then it is a scalene triangle. If two sides are the same length, then it is an isosceles triangle. If all three sides are the same length, then it is an equilateral triangle.

To determine whether the triangle is acute, right, or obtuse, add the squares of the two smaller sides, and compare the sum to the square of the largest side. Since this sum is greater, the triangle is acute.

Classifying Triangles by Angles In an acute triangle all three angles are acute (less than 90 degrees). A right triangle contains one right angle and two acute angles. And an obtuse triangle contains one obtuse angle (greater than 90 degrees) and two acute angles. And an isosceles triangle has two congruent angles.