Characteristics of Triangles

Can the following 3 numbers be side measures of a triangle

10, 18, 10

• Yes

• No

Can the following 3 numbers be side measures of a triangle

• Yes

• No

Can the following 3 numbers be side measures of a triangle

• Yes

• No

What is the missing Angle?

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Lydia drew the Venn diagram behind...
Use the Venn diagram to answer the question that follows

• All isosceles triangles are equilateral.

• All equilateral triangles are isosceles.

• All equilateral triangles are scalene.

• All scalene triangles are isosceles.

Which are characteristics of an isosceles triangle?

• It has two congruent or equal sides

• It has three congruent or equal sides

• It has no congruent or equal sides

• It has four congruent or equal sides

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

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

• right

• one

• obtuse

• scalene

• two

• three

• acute

What is the missing Angle?

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