Sometimes Always Never With Triangles

An equilateral triangle is _______________________ an obtuse triangle

• Always

• Sometimes

• Never

An equilateral triangle is ______________________ an isosceles triangle.

• always

• sometimes

• never

A right triangle is ______________ an isosceles triangle.

• always

• sometimes

• never

Triangles are regular polygons

• Always

• Sometimes

• Never

A ​ (a)   triangle has ​ (b)   right triangle,

• right

• one

• obtuse

• scalene

• two

• three

• acute

A ​ (a)   triangle has ​ (b)   right angle,

• right

• one

• obtuse

• scalene

• two

• three

• acute

A ​ (a)   triangle has ​ (b)   right angle.

• right

• one

• obtuse

• scalene

• two

• three

• acute

Select the false statement based on the relationship among the triangles.

• The obtuse triangles are in a separate circle because an obtuse triangle can never be an acute triangle

• The equilateral triangle is inside the acute triangle because equilateral triangles are always acute.

• The acute triangle and the equilateral have the same type of angles

• The acute triangle and the equilateral triangle share no common attributes.

Select all of the attributes that can belong where the question mark is.

• all right angles

• 2 sides will have equal length

• no right angles

• all acute angles

• all sides have equal lengths

Easton says he has a triangle with 1 obtuse angle and 3 different side lengths. Select the statement that correctly identifies this triangle.

• The triangle must be an obtuse scalene triangle

• This triangle must be an obtuse isosceles triangle

• The triangle must be an obtuse right triangle

• The triangle must be an obtuse equilateral triangle