G4 L16-2 Classify Triangles

Less 16-2

Classify Triangles

LESSON OBJECTIVES

Classify triangles by line segments and angles.

Review then Solve the book's practices.

Pages 829-830

Multiple Choice

How many equal sides does an equilateral triangle have?

• 2 equal sides

• 3 equal sides

• no equal sides

Multiple Choice

What is an obtuse triangle?

• a triangle that has one obtuse angle.

• a triangle that has three obtuse angles.

• a triangle that only has acute angles.

Multiple Choice

What is a triangle that has three equal sides and three acute angles called?

• isosceles acute triangle

• equilateral acute triangle

• scalene acute triangle

Multiple Choice

How many right angles does a right triangle have?

• one right angle

• 2 right angles

• no right angles

Multiple Choice

What is an isosceles triangle?

• a triangle that has 2 equal sides.

• a triangle that has a right angle.

• a triangle that has 3 equal sides and 3 acute angles.

Multiple Choice

What is a triangle that has no equal sides called?

• acute triangle

• equilateral triangle

• scalene triangle

Let's practice!

Open your book pages 829-830.

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Open Ended

Page 830 Q20

Draw each triangle in its correct angle classification.

Tell which triangles are acute, obtuse and right.

Poll

SELF ASSESSMENT

How well did you do in this lesson's practice?

• 😞 I am very confused! I can't do it by myself!

• 🤔 I am still confused! I need some help!

• 😉 I can do it by myself, but I make some mistakes!

• 😍 I can do it without mistakes & I can help other!