Angles and Shapes Review

A 90^o angle is called what?

• Acute Angle

• Right Angle

• Left Angle

• Obtuse Angle

• Straight line

Answer explanation

A 90° angle is called a Right Angle. Acute angles are less than 90°, obtuse angles are greater than 90° but less than 180°, and a straight line is 180°. Therefore, the correct answer is Right Angle.

An angle less than 90^o is called what?

• Acute Angle

• Right Angle

• Left Angle

• Obtuse Angle

• Straight line

Answer explanation

An angle less than 90° is called an acute angle. Right angles are exactly 90°, obtuse angles are greater than 90° but less than 180°, and straight lines are 180°. Therefore, the correct answer is acute angle.

An angle less than 90^o is called what?

• Acute Angle

• Right Angle

• Left Angle

• Obtuse Angle

• Straight line

Answer explanation

An angle less than 90° is called an acute angle. Right angles are exactly 90°, obtuse angles are greater than 90° but less than 180°, and straight lines are 180°. Therefore, the correct answer is acute angle.

An angle greater than 90^o is called what?

• Acute Angle

• Right Angle

• Left Angle

• Obtuse Angle

• Straight line

Answer explanation

An angle greater than 90° but less than 180° is called an obtuse angle. Acute angles are less than 90°, right angles are exactly 90°, and straight lines are 180°. Therefore, the correct answer is obtuse angle.

How many degrees is a straight line?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Answer explanation

A straight line measures 180 degrees. This is because it represents the angle formed when two rays point in exactly opposite directions, creating a half-circle.

How many degrees does a triangle's angles add up to?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Answer explanation

The sum of the angles in any triangle is always 180 degrees. This is a fundamental property of triangles in Euclidean geometry, making 180 degrees the correct answer.

How many degrees does a quadrilateral's (i.e. square, rectangle, rhombus, etc.) angles add up to?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Answer explanation

The sum of the interior angles of any quadrilateral is always 360 degrees. This applies to all types of quadrilaterals, including squares, rectangles, and rhombuses.

How many degrees is a circle?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Answer explanation

A circle is defined as having 360 degrees. This is the total angle measurement around a point, making 360 degrees the correct answer.

What is half of a Right Angle?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

Answer explanation

A right angle measures 90 degrees. Half of 90 degrees is 45 degrees, making it the correct answer. The other options (90, 180, 360 degrees) do not represent half of a right angle.

What shape is this?

• Circle

• Rectangle

• Rhombus

• Square

• Triangle

Answer explanation

A square is a shape with four equal sides and four right angles. Among the options, only 'Square' fits this description, distinguishing it from other shapes like rectangles and rhombuses.