4th Grade Geometry Review

Lines that will never cross are called ​ lines.

(a)  

• parallel
• perpendicular
• straight

Lines that cross and make 90 degree angles are called ​ (a)   lines.​

• perpendicular
• parallel
• straight

Obtuse angles are

• Less than 90 degrees

• Exactly 90 degrees

• Greater than 90 degrees

Acute angles are

• Less than 90 degrees

• Exactly 90 degrees

• Greater than 90 degrees

Right angles are

• Less than 90 degrees

• Exactly 90 degrees

• Greater than 90 degrees

Select the acute angle.

Select the obtuse angle.

Select the right angle.

What do the marks in the sides of this shape mean?

• Those sides are parallel

• Those sides are congruent

• Those sides are different

• Those sides are wrong

What do the marks on this shape mean?

• Those sides are parallel

• Those sides are perpendicular

• Those sides are congruent

• Those sides are wrong