Proportion & Measures of the Interior Angles of a Polygon

Tickets for a concert are sold at a ratio of 3 adult tickets for every 2 student tickets. If 180 adult tickets were sold, how many student tickets were sold?

• 60

• 90

• 120

• 270

A lemonade recipe calls for 4 cups of water for every 1 cup of lemon juice. If you have 12 cups of water, how many cups of lemon juice do you need?

• 3 cups

• 4 cups

• 8 cups

• 16 cups

A blueprint has a scale of 1 inch : 10 feet. If a wall measures 2.5 inches on the blueprint, what is the actual length of the wall?

• 10 feet

• 12.5 feet

• 20 feet

• 25 feet

An alloy is made by mixing 5 parts copper with 3 parts zinc. If 20 grams of copper are used, how many grams of zinc are needed?

• 6 grams

• 12 grams

• 15 grams

• 33.3 grams

Two gears are connected. The first gear has 24 teeth, and the second gear has 16 teeth. For every 4 rotations of the first gear, how many rotations does the second gear make?

• 2 rotations

• 4 rotations

• 6 rotations

• 8 rotations

What is the sum of the interior angles of a hexagon?

• 360°

• 540°

• 720°

• 900°

A regular pentagon has interior angles of what measure?

• 72°

• 108°

• 120°

• 144°

What is the measure of ONE interior angle in a regular octagon?

• 135°

• 140°

• 144°

• 150°

If the sum of the interior angles of a polygon is 1800°, how many sides does it have?

• 10

• 12

• 14

• 16

A polygon has 15 sides. What is the sum of its interior angles?

• 2340°

• 2520°

• 2700°

• 2880°