Symmetry, Lines & Angles

What kinds of lines are these?

• parallel lines

• intersecting lines

• perpendicular lines

• obtuse angles

• none of these

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What kinds of lines are these?

• parallel lines

• intersecting lines

• perpendicular lines

• obtuse angles

• none of these

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What kinds of lines are these?

• parallel lines

• intersecting lines

• perpendicular lines

• obtuse angles

• none of these

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What kinds of lines are these?

• parallel lines

• intersecting lines

• perpendicular lines

• obtuse angles

• none of these

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

What is true of this triangle? Select all the attributes that apply.

• one right angle

• two obtuse angles

• two acute angles

• all sides the same length

• two sides the same length

Answer explanation

Triangles cannot have more than one obtuse or right angle. All triangles have at least two acute angles. This triangle is a right isoscelese triangle.

Tags

CCSS.4.G.A.2

Which of these triangles have at least two acute angles?

• A, B, D & F

• C & E only

• B & F only

• All of them

• None of them

Answer explanation

Every triangle has at least 2 acute angles.

Tags

CCSS.4.G.A.2

Which are right triangles?

• A, B, D & F

• C & E only

• B & F only

• all of them

• none of them

Answer explanation

Right triangles usually have a little square in the corner.

Tags

CCSS.2.G.A.1

Which triangles have one pair of perpendicular lines?

• A, B, D & F

• C & E only

• B & F only

• all of them

• none of them

Answer explanation

Perpendicular lines always make right angles!

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Which of these triangles have no obtuse and no right angles?

• A, B, D & F

• C & E only

• B only

• all of them

• none of them

Answer explanation

Perpendicular lines always make right angles!

Tags

CCSS.4.G.A.2

Which of these triangles have two obtuse or two right angles?

• A, B, D & F

• C & E only

• B only

• all of them

• none of them

Answer explanation

Triangles can only have ONE obtuse or right angle.

Tags

CCSS.8.G.A.5