Using a small model, the CyberSquad tests various aiming points and learns about angles of reflection. They use this knowledge to escape a cave. The CyberSquad decides to slide the key along the ice until it bounces off the cave wall and travels to Jackie and Matt on the other side.

Content Standard(s):

Mathematics MA2019 (2019) Grade: 4

24. Identify an angle as a geometric shape formed wherever two rays share a common endpoint.

Unpacked Content

Evidence Of Student Attainment:

Students:

Describe an angle.

Describe an angle's relationship to a circle.

Teacher Vocabulary:

Angle

Ray

Endpoint

Geometric shape

Vertex

Line

Point

Line segment

Knowledge:

Students know:

Angles are geometric shapes formed when two rays share a common endpoint.

How to draw points, lines, line segments, and rays

Skills:

Students are able to:

Identify an angle as two rays with a common endpoint.

Understanding:

Students understand that:

angles are geometric shapes made of two rays that are infinite in length and are measured with reference to a circle with its center at the common endpoint of the rays.

Diverse Learning Needs:

Essential Skills:

Learning Objectives: M.4.24.1: Define degree, angle, ray, and vertices.
M.4.24.2: Recognize and draw shapes having specified attributes such as a given number of angles or a given number of equal faces.
M.4.24.3: Estimate angle measures using 45^{o}, 90^{o}, 180^{o}, 270^{o}, or 360^{o}.
M.4.24.4: Identify angle, ray, and vertices.
M.4.24.5: Draw shapes to possess defining attributes.

Prior Knowledge Skills:

Build and draw shapes to possess defining attributes.

Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles).

Model partitioning circles and rectangles.

Decompose pictures made of simple shapes.

Identify squares, circles, triangles and rectangles.

Explore shapes or figures that can be decomposed into smaller equal parts.

Alabama Alternate Achievement Standards

AAS Standard: M.AAS.4.24 Recognize and Identify angles in geometric shapes as larger or smaller.