Lesson 5.25.1 · 5.2 · 5.3 Catch-Up
Start hereWords, worked example, and sentence starters
Learning target I can show I am caught up on Lessons 5.1 · 5.2 · 5.3 by using each lesson's big idea in mixed practice.
Why This Matters Missed a lesson — or just want a refresher? This catch-up station reviews Lessons 5.1 · 5.2 · 5.3: 5.1 Determine the Area of Parallelograms and Rhombuses, 5.2 Determine the Area of Triangles, 5.3 Determine the Area of Trapezoids. Work one example from each lesson, then prove you're caught up in the mixed practice.
Start hereWords for this lesson
Read each word before you begin. Say it out loud.
| Word | What it means | Example |
|---|---|---|
| Slanted sideSpanish: Lado inclinado | A side that leans instead of going straight up and down. It is not the perpendicular height. | In a leaning parallelogram, use the dashed 90° height—not the slanted side—in A = b × h. |
| ParallelogramSpanish: Paralelogramo | A four-sided shape with two pairs of parallel sides. | Think of a leaning door — the top and bottom are parallel, and the two sides are parallel, like a slanted rectangle |
| ParallelSpanish: Paralelas | Two lines or sides that stay the same distance apart and never meet. | The top and bottom of a parallelogram never get closer together — matching arrowheads (›) mark one parallel pair, double arrowheads (››) mark the other. |
| BaseSpanish: Base | Any side of a parallelogram can be the base. Once you pick a base, the height must be measured perpendicular (at a 90° angle) to it. | b in A = ½bh |
| HeightSpanish: Altura | The straight-up distance from the base to the top. | h in A = ½bh |
| PerpendicularSpanish: Perpendicular | Two lines that meet to make a square corner (90 degrees). | The dashed height meets the base at a square corner — the small 90° box is what makes it perpendicular, not slanted. |
How it worksWorked example
These numbers are not on your problems. The steps are. Follow them with your own numbers.
A triangle has a base of 14 cm and a height of 9 cm. Find its area.
- 14 × 9 = 126
- 126 is the parallelogram made by two triangles.
- 126 ÷ 2 = 63
Answer: 63 cm²
Now you trySame steps, your turn
The steps are the same as the worked example. The numbers are yours. Do the work.
A parallelogram has a base of 9 m and a height of 4 m. Find its area.
Say it and write itSentence starters
Finish each sentence out loud with a partner. Then use them in your writing.
- The base of the triangle is and the height is .
- I know that measure is the height because .
- Two copies of this triangle would compose a .
- Area = ½ × × = square units.
Word bank triangleparallelogramhalfbaseheightperpendicularsquare cornerareaformularight trianglecopyrotate
Watch out!A common mistake
A common mistake in Area of Trapezoids is forgetting the ½ in A = ½ × (b1 + b2) × h. After adding the bases and multiplying by the height, students stop there instead of taking half
Lesson 5.25.1 · 5.2 · 5.3 Catch-Up
Catch-UpSkill bridge
Learning target I can show I am caught up on Lessons 5.1 · 5.2 · 5.3 by using each lesson's big idea in mixed practice.
Why This Matters Missed a lesson — or just want a refresher? This catch-up station reviews Lessons 5.1 · 5.2 · 5.3: 5.1 Determine the Area of Parallelograms and Rhombuses, 5.2 Determine the Area of Triangles, 5.3 Determine the Area of Trapezoids. Work one example from each lesson, then prove you're caught up in the mixed practice.
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1Complete each step, then write the final answer.
A parallelogram has a base of 6 m and a height of 3 m. Find its area.
Show your workHint Multiply the base by the height.
Final answer: -
2Complete each step, then write the final answer.
A parallelogram has a base of 8 in, a height of 2 in and a slanted side of 3 in. Find its area.
Show your workHint Use the height, not the slanted side.
Final answer: -
3Complete each step, then write the final answer.
A triangle has a base of 4 m and a height of 3 m. Find its area.
Show your workHint Multiply the base by the height. Then take half.
Final answer: -
4Complete each step, then write the final answer.
A triangle has a base of 10 in and a height of 5 in. Find its area.
Show your workHint Multiply 10 × 5. Then take half.
Final answer: -
5Complete each step, then write the final answer.
A trapezoid has bases of 1 m and 5 m. Its height is 4 m. Find its area.
Show your workHint Add the bases. Multiply by the height. Then take half.
Final answer: -
6Complete each step, then write the final answer.
A trapezoid has bases of 3 ft and 9 ft. Its height is 2 ft. Find its area.
Show your workHint Add 3 + 9 first.
Final answer:
Explain your thinkingIf you copied this trapezoid, flipped it, and placed it next to the original, what shape would you get? How does this help you find the area?
Sentence starter The area of the trapezoid is 1/2 x (___ + ___) x ___ = 1/2 x ___ x ___ = ___ square feet.