Mastering Basic Geometric Constructions

This video tutorial from Howard Community College demonstrates three basic geometric constructions: copying a line segment, copying an angle, and copying a triangle. The instructor provides step-by-step guidance on using a compass to replicate these geometric figures, ensuring the copied figures are congruent to the originals. The tutorial is designed to supplement course material and enhance understanding of fundamental geometry concepts.

What are the three basic geometric constructions demonstrated in the video?

• Copying a line segment, copying an angle, copying a square

• Copying a line segment, copying a square, copying a triangle

• Copying a line segment, copying an angle, copying a triangle

• Copying a line segment, copying a circle, copying a triangle

What is the first step in copying a line segment?

• Drawing a line to copy onto

• Setting the compass radius

• Placing a point on the line

• Drawing an arc

How do you set the compass when copying a line segment?

• Equal to the angle of the line segment

• Equal to the height of the line segment

• Equal to the width of the line segment

• Equal to the length of the line segment

What is the first step in copying an angle?

• Drawing a ray

• Placing a point on the ray

• Drawing an arc

• Setting the compass radius

Where do you place the compass point when drawing the first arc for copying an angle?

• At the endpoint of the ray

• At the vertex of the original angle

• At the midpoint of the original angle

• At the midpoint of the ray

Tags

CCSS.4.MD.C.6

What do you measure with the compass when copying an angle?

• The distance between the two rays

• The distance between the vertex and the arc

• The distance between the arc and the ray

• The distance between the points where the arc crosses the sides of the angle

Tags

CCSS.4.MD.C.6

What is the first step in copying a triangle?

• Drawing an arc

• Drawing a line for the base

• Placing a point on the line

• Setting the compass radius

Tags

CCSS.2.G.A.1

How do you copy the base of the triangle?

• By setting the compass equal to the base length

• By drawing a ray

• By measuring the height of the triangle

• By drawing an arc

Tags

CCSS.2.G.A.1

What do you do after copying the base of the triangle?

• Draw a ray

• Draw an arc

• Copy one of the remaining sides

• Copy the height of the triangle

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

What does it mean when the three sides of the copied triangle are congruent to the original?

• The triangles are proportional

• The triangles are identical

• The triangles are congruent

• The triangles are similar

Tags

CCSS.8.G.A.2