1st Nine 5th Grade Math

____________: In an acute triangle, all angle are less than 90 degrees, so all angles are acute angles.The following is an acute triangle.

• Acute triangle
• Obtuse Triangle
• Right Angle

___________ triangle: An _________ triangle has one angle that is bigger than 90 degrees The following is an _________ triangle. 

• Obtuse
• Acute
• Right
• Scalene

________ triangle. The triangle as two equal sides and two equal angles.

• perpendicular
• Equalateral
• Isosceles

________ Triangle. The Scalene Triangle has no congruent sides

• Scalene
• Peremeter
• area
• equalatera

________  triangles have
exactly one right angle.

• Right
• Left
• Acute
• obtuse

 What are: acute, obtuse, and right triangles 

• (classification according to angles). 
• Area
• Triangle peremeter
• acute box

 right angles
(exactly 90°)

• true
• false

obtuse angles
(more than 90°, less than ______)

• 180°
• 360
• 45
• 145

acute angles
(less than________°)

• 120
• 105
•  90
• 180

Triangles are polygons with the least possible number of sides __________

• 3
• 4
• 5
• 6