Exploring 2D Geometry Concepts for STAAR Review

This video tutorial by Miss Stig covers a comprehensive review of 2D geometry, focusing on polygons, quadrilaterals, circles, composite figures, and angle relationships. It begins with an introduction to polygons, discussing triangles and the importance of base and height. The tutorial then explores quadrilaterals, including rectangles, parallelograms, and trapezoids, and their area calculations. Circles are examined next, with a focus on circumference and area formulas. The video also covers composite figures, explaining how to calculate their area by decomposing them into basic shapes. Finally, angle relationships are discussed, including the sum of angles in triangles and the concepts of complementary and supplementary angles.

What is the formula for the area of a triangle?

• Base plus height

• Base divided by height

• Base times height

• One half base times height

Which type of triangle has a height outside the triangle?

• Any triangle depending on the base

• Isosceles

• Equilateral

• Scalene

In a parallelogram, how is the height positioned relative to the base?

• Perpendicular to the base

• At an obtuse angle to the base

• Parallel to the base

• At an acute angle to the base

What is the area formula for a trapezoid?

• Base times height

• One half base times height

• Sum of bases times height divided by two

• Height divided by sum of bases

What is the relationship between the diameter and the radius of a circle?

• Diameter is half the radius

• Radius is half the diameter

• Diameter is twice the radius

• Radius is twice the diameter

Which formula can be used to calculate the circumference of a circle?

• Both A and C

• Pi times radius

• Two times pi times radius

• Pi times diameter

What is the area of a semicircle based on the circle's radius?

• Pi times radius squared

• Pi times diameter squared

• Two times pi times radius squared

• Pi times radius squared divided by two

How do you find the area of a composite figure?

• Multiply the areas of the shapes

• Add the areas of the shapes

• Subtract the areas of the shapes

• Divide the areas of the shapes

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

• 360 degrees

• 90 degrees

• 180 degrees

• 270 degrees

What type of angles sum up to 90 degrees?

• Supplementary angles

• Complementary angles

• Exterior angles of a polygon

• Interior angles of a triangle