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7th Grade Triangles & Cross Sections Worksheets

7th Grade Triangles & Cross Sections: draw triangles from given measures and describe slices of 3D shapes. Every worksheet is free, prints as a PDF with an answer key, and can be assigned online. The ones teachers open most are first.

← All 7th grade topics 7.G.2 7.G.3

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7th Grade Triangles & Cross Sections Worksheets - Creating Triangles worksheet

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Creating Triangles

7g2

Student objectives

Use a given angle as a starting point to draw a triangle that fits the angle.
Draw straight line segments from the angle’s vertex to make three sides that meet at three corners.

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7th Grade Triangles & Cross Sections Worksheets - Slicing 3d Shapes worksheet

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Slicing 3d Shapes

7g3

Student objectives

Figure out what 2d shape you get when a 3d solid is sliced.
Tell the difference between slices that make circles, triangles, rectangles, and other polygons.
Use clues from the direction of the cut (straight across, angled, or through the middle) to predict the cross-section.

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7th Grade Triangles & Cross Sections Worksheets - Identifying Triangle Angles and Lengths worksheet

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Identifying Triangle Angles and Lengths

7g2

Student objectives

Decide whether three given side lengths can actually make a triangle.
Decide whether three given angle measures can form a triangle.
Use the triangle inequality rule to compare side lengths and check if a triangle is possible.
Use the fact that a triangle’s angles add up to 180° to check if a triangle is possible.

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7th Grade Triangles & Cross Sections Worksheets - Using Perspectives worksheet

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Using Perspectives

7g3

Student objectives

Picture what a 3D solid would look like when you look at it from the front, side, or top.
Match a 3D shape to the correct 2D view of its faces and edges.
Use clues like which parts are visible or hidden to choose the right perspective.
Mentally rotate a solid to see how its view changes without moving the paper.

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More 7th grade topics

Proportional Relationships 11 Adding & Subtracting Integers 18 Angle Relationships 7 Probability 14 Multiplying & Dividing Rational Numbers 8 Circles: Area & Circumference 4 Percent Problems 9 Simplifying Expressions 5 Scale Drawings 3 Samples & Populations 2 Compound Events & Sample Spaces 6 Equations & Inequalities 1

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