I can find the area of a trapezoid using the formula A = ½(b1 + b2) × h.Puedo hallar el área de un trapecio usando la fórmula A = ½(b1 + b2) × h.
MissionMisión · Reef RescueRescate del arrecife
Protect the coral, one calculation at a time.Protege el coral, un cálculo a la vez.
Reef Rescue is building coral nurseries with trapezoid-shaped beds and ramps. Find the area of each trapezoid with both parallel bases and the perpendicular height, so every polyp gets the room it needs.
Rescate del Arrecife está construyendo criaderos de coral con camas y rampas en forma de trapecio. Halla el área de cada trapecio con las dos bases paralelas y la altura perpendicular, para que cada pólipo tenga el espacio que necesita.
Word bankBanco de palabras 4 words4 palabrastrapezoid, bases (b₁, b₂), height, …trapecio, bases (b₁, b₂), altura, …
- trapezoidtrapecio
- A four-sided shape with just one pair of parallel sides.Una figura de cuatro lados con solo un par de lados paralelos.
- bases (b₁, b₂)bases (b₁, b₂)
- The two parallel sides of a trapezoid.Los dos lados paralelos de un trapecio.
- heightaltura
- The straight-up distance between the two parallel bases.La distancia recta entre las dos bases paralelas.
- decomposedescomponer
- Break a figure into simpler shapes.Separar una figura en figuras más simples.
Stage 1 of 5Etapa 1 de 5
Get ReadyPrepárate
Wake up what you know, then explore today's model.
Activa lo que sabes y luego explora el modelo de hoy.
- A trapezoid has bases 8 and 4 and a height of 5. Predict the area of a rectangle with the same height whose length is the average of the two bases. Then set the model's second base to 4 and compare its trapezoid area.
- What is the area of a triangle with base 7 m and height 4 m?
- 11 square m
- 14 square m
- 14 m
- 28 square m
- What is the area of a triangle with base 12 cm and height 5 cm?
- 17 square cm
- 30 square cm
- 30 cm
- 60 square cm
- A triangle has an area of 36 square inches and a base of 9 inches. What is its height?
- 4 inches
- 8 inches
- 27 inches
- 324 inches
- 1 fresh problem with new numbers each time (interactive only).
Stage 2 of 5Etapa 2 de 5
Try ItInténtalo
Use the hints when you need them. Every wrong answer tells you why.
Usa las pistas cuando las necesites. Cada respuesta incorrecta te dice por qué.
- What is the area of a trapezoid with bases 6 cm and 10 cm, and height 4 cm?
- 24 sq cm
- 32 sq cm
- 40 sq cm
- 64 sq cm
- A trapezoid has an area of 45 sq ft, bases of 7 ft and 11 ft. What is the height?
- 3 ft
- 5 ft
- 9 ft
- 10 ft
- What is the first step when finding the area of a trapezoid?
- Multiply the two bases
- Subtract the shorter base from the longer base
- Add the two bases together
- Divide the height by 2
Stage 3 of 5Etapa 3 de 5
On Your OwnPor tu cuenta
Tables, mistakes to find, and problems with a few steps.
Tablas, errores por encontrar y problemas de varios pasos.
- Fill in the table
- Match each shape to its area.
- A trapezoid has bases of 6 ft and 10 ft, and an area of 48 sq ft. Place a point at the height. (Hint: 48 = ½ × 16 × h → h = 6)
- What is the best next move?
- Add the two bases: 7 + 11.
- Multiply the two bases: 7 × 11.
- Add all three numbers: 7 + 11 + 6.
- Use only the longer base: ½ × 11 × 6.
Stage 4 of 5Etapa 4 de 5 · OptionalOpcional
Practice MorePractica más
Optional extra practice. Press New numbers for another problem on the same skill.
Práctica extra opcional. Toca Números nuevos para otro problema de la misma habilidad.
- 5 fresh problems with new numbers each time (interactive only).
Stage 5 of 5Etapa 5 de 5
Show What You KnowDemuestra lo que sabes
Show what you learned today. Take your time; you can try again.
Muestra lo que aprendiste hoy. Tómate tu tiempo; puedes intentarlo otra vez.
- What is the area of the trapezoidal driveway?
- 47 sq ft
- 120 sq ft
- 240 sq ft
- 480 sq ft
- How many bags of concrete does the builder need?
- 6
- 24
- 40
- 240
- Why add the two parallel edges and then take half?
- Because trapezoids are half of rectangles
- Because the average of the two bases acts like one rectangle's width
- Because 20 + 12 = 32 is easier
- Because the height must be halved