Unit 5 · Standard 6.G.1
Area of Triangles Flagship
Sky Harbor Mission
The Triangular Skylight
You are the lead architect at Sky Harbor Studio. The city has hired your firm to design a glass skylight made of triangular panels for the new transit hub. Before the glass can be cut, you must master the area of triangles — every wrong measurement wastes expensive glass.
My Notes Level 1 Support Level 2 Standard Level 3 Enrichment
Today's objectives
Content Objective: I can find the area of a triangle using the formula A = ½ × base × height.
Language Objective: I can explain my steps using the words base, height, area, and perpendicular.
📖 See Learn It for the explanation and worked examples, and the Vocab tab for the words. These are your notes to fill in and keep.
✏️ Fill in each blank as we go. Use the Word Bank to help you.
👆 Tap any word to see what it means and a picture.
Level 3: try the blanks from memory first, then check the bank.
- 1The side of a triangle used as the bottom for measuring area is the .
- 2The perpendicular distance from the base to the opposite vertex is the .
- 3The amount of flat space inside a triangle is its .
- 4Two lines that meet at a 90° angle are .
- 5A shape made of two or more basic shapes combined is a .
- 6A math rule written with symbols, like A = ½ × b × h, is a .
Reflect — Exit Ticket
A triangle has a base of 11 inches and a height of 8 inches. What is its area?
- 44 sq in
- 88 sq in
- 19 sq in
- 44 in