Online test questions: Scalene, isosceles, equilateral triangle classification

📚 Quick Study Guide

• 📐 Equilateral Triangle: All three sides are equal in length, and all three angles are equal to $60^\circ$.
• 📏 Isosceles Triangle: Two sides are equal in length, and the angles opposite those sides are also equal.
• 🚧 Scalene Triangle: All three sides have different lengths, and all three angles have different measures.
• ➕ Key Property: The sum of the angles in any triangle is always $180^\circ$.
• 💡 Tip: Look for markings on the sides of the triangle to indicate equal lengths.

✏️ Practice Quiz

1. What type of triangle has all three sides of different lengths?
   1. Equilateral
   2. Isosceles
   3. Scalene
   4. Right
2. A triangle has two sides that are 5 cm long and one side that is 7 cm long. What type of triangle is it?
   1. Equilateral
   2. Isosceles
   3. Scalene
   4. Right
3. In an equilateral triangle, what is the measure of each angle?
   1. $30^\circ$
   2. $45^\circ$
   3. $60^\circ$
   4. $90^\circ$
4. Which of the following statements is true about an isosceles triangle?
   1. All sides are equal.
   2. No sides are equal.
   3. Two sides are equal.
   4. It always has a right angle.
5. A triangle has angles measuring $80^\circ$, $50^\circ$, and $50^\circ$. What type of triangle is it?
   1. Equilateral
   2. Isosceles
   3. Scalene
   4. Right
6. If a triangle has sides of lengths 3, 4, and 5, what type of triangle is it?
   1. Equilateral
   2. Isosceles
   3. Scalene
   4. Right
7. Which triangle has no equal angles?
   1. Equilateral
   2. Isosceles
   3. Scalene
   4. Right