At an angle of 90° to another line or surface:

Two _____ lines form a right angle.

_____means also standing or rising straight up: The cliff was nearly _____ and impossible to climb.

• Loft

• Perpendicular

• Magnitude

• Tangent

Answer explanation

Fun fact: perpendicular lines are also intersecting lines because the two lines cross each other at one point! However, not all intersecting lines are perpendicular.

_____ to a surface is a vector which is perpendicular to the surface at a given point.

: In geometry, a _____is an object that is perpendicular to a given object.

• Loft

• Perpendicular

• Normal

• Tangent

Answer explanation

What is the difference between normal and perpendicular?

While normal and perpendicular are often used interchangeably, they actually have different meanings and applications.

Normal refers to a line that is perpendicular to a surface at a given point, while perpendicular refers to the relationship between two lines or vectors that meet at a right angle.

In a design class, Lily is working on a sketch for a new building. She needs to specify the size and distance of elements within her sketch. Which tool should she use?

• Twist

• Dimension

• Loft

• Tangent

A straight line or plane that touches a curve or curved surface at a point, but if extended does not cross it at that point.

• Loft

• Perpendicular

• Normal

• Tangent

Answer explanation

A tangent line to a curve was a line that just touched the curve at that point and was “parallel” to the curve at the point in question. Well tangent planes to a surface are planes that just touch the surface at the point and are “parallel” to the surface at the point.

A curve defined by control points that can be used to create organic and free-form shapes.

• Ellipse

• Spline

• Corner-rectangle

• 3 point arc

Answer explanation

The question asks about a curve defined by control points used for creating organic and free-form shapes. Among the given options, a 'Spline' fits this description perfectly. An 'Ellipse', 'Corner-rectangle', and '3 point arc' are specific shapes, not curves defined by control points. Therefore, the correct answer is 'Spline'.

Creating a new plane at a specified distance from an existing plane. Creating a new sketch or object at a specified distance from an existing sketch or object.

• Construction line
• Dimension
• Axis
• Offset

A method of drawing an object. It shows the object from three different angles: front, top, and side. These angles are based on a coordinate system with right angles. The views represent the exact shape of an object as seen from one side at a time as you are looking perpendicularly to it. Depth is not shown. An ________ drawing is also called a multiview drawing.

• Orthographic
• Isometric
• Two-perspective
• Ergonomic

A curve or line used to control the shape of a loft or other 3D feature.

• Arc

• Guide curve

• Construction line

• Spline

A sketch representing a polygon, a closed geometric shape with straight sides.

• Polygon Sketch

• Twist

• Shell Feature

• Reference Plane

A tool that removes material from a 3D object, creating a hollow or cavity.

• Coincident Relation

• Split Tool

• Shell Feature

• Reference Plane