Triangles and Symmetry

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Janelle made a flag in the shape of a right triangle. Which of the triangles could be Janelle’s flag?

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Select all of the figures that have at least one line of symmetry.

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If the angles on a triangle all measure less than 90 degrees, what type of triangle is it?

• obtuse triangle

• right triangle

• straight triangle

• acute triangle

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

Which type of triangle has no equal side lengths?

• Isosceles Triangle

• Equilateral Triangle

• Scalene Triangle

• None of the above

Raven drew an equilateral triangle and named it ABC. If one side is 3 inches, what are the lengths of each of the other two sides of the triangle?

• 3 inches

• 4 inches

• 5 inches

• 6 inches

Which set of angles could form a triangle?

• Three right angles

• Three acute angles

• Two right angles, one acute angle

• One right angle, one obtuse angle, one acute angle

Which of the following are right triangles? (Hint: Select 2)

• A

• B

• C

• D

What type of triangle is pictured?

• acute

• obtuse

• right

• wrong