Question

question 5
1 pts
a select triangle has one 90 degree angle. this angle is called a right
angle.
an select triangle has three equal sides. all of its sides and angles
are congruent. this means they are the same length.
a select triangle has no equal sides. all of its sides are different
lengths.
an select triangle has one angle greater than 90 degrees. this is
called an obtuse angle.
an select triangle has three angles less than 90 degrees. all of its
angles are acute.
an select triangle has two equal sides. two of its sides are
congruent: the third side is a different length.

Explanation:

• A triangle with one \(90\)-degree angle (right - angle) is called a right - angled triangle.
• A triangle with three equal sides and angles is an equilateral triangle.
• A triangle with no equal sides (all sides of different lengths) is a scalene triangle.
• A triangle with one angle greater than \(90\) degrees is an obtuse - angled triangle.
• A triangle with three angles less than \(90\) degrees (all acute angles) is an acute - angled triangle.
• A triangle with two equal sides (the third side is different) is an isosceles triangle.

Answer:

A triangle has one \(90\) degree angle. This angle is called a right - angled triangle.
An equilateral triangle has three equal sides. All of its sides and angles are congruent. This means they are the same length.
A scalene triangle has no equal sides. All of its sides are different lengths.
An obtuse - angled triangle has one angle greater than \(90\) degrees. This is called an obtuse angle.
An acute - angled triangle has three angles less than \(90\) degrees. All of its angles are acute.
An isosceles triangle has two equal sides. Two of its sides are congruent: the third side is a different length.