Surface Area And Volume
Akopọ
Once shapes leave the flat page and become solid, two new measurements matter: how much space a solid takes up, and how much surface it has. Volume tells you the capacity of a box, a tank or a tin; surface area tells you how much material wraps it or how much paint covers it. A small family of formulas handles cuboids, prisms, cylinders, spheres, cones and pyramids.
In this lesson you will calculate the volume and surface area of the standard solids, learning how prisms all share one idea (cross-section times length) and how the curved surfaces of cylinders, cones and spheres are found. The key habit is keeping track of units: volume is always cubic and surface area always square, and confusing them is the classic mistake this lesson trains you to avoid.
Awọn Afojusun
- Carry out calculations and solve problems involving the surface area and volume of a: cuboid prism cylinder sphere pyramid cone.
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Oriire fun ipari ẹkọ lori Surface Area And Volume. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- A cuboid measures 5 cm by 4 cm by 3 cm. What is its volume? A. 12 cm^3 B. 47 cm^3 C. 60 cm^3 D. 94 cm^3 Answer: C
- A cylinder has radius 3 cm and height 10 cm. Using pi = 3.142, what is its volume to 1 d.p.? A. 94.3 cm^3 B. 188.5 cm^3 C. 282.8 cm^3 D. 942.6 cm^3 Answer: C
- A sphere has radius 6 cm. Using pi = 3.142, what is its surface area to 1 d.p.? A. 113.1 cm^2 B. 226.2 cm^2 C. 452.4 cm^2 D. 904.9 cm^2 Answer: C
- A cone has base radius 3 cm and vertical height 4 cm. Using pi = 3.142, what is its volume to 2 d.p.? A. 12.57 cm^3 B. 37.70 cm^3 C. 113.11 cm^3 D. 150.82 cm^3 Answer: B
- A pyramid has a square base of side 6 cm and vertical height 10 cm. What is its volume? A. 60 cm^3 B. 120 cm^3 C. 180 cm^3 D. 360 cm^3 Answer: B
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Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Solve Geometry Applications: Volume and Surface Area
Find volume and surface area of rectangular solids
"Prealgebra: Solve Geometry Applications: Volume and Surface Area" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/prealgebra/pages/9-6-solve-geometry-applications-volume-and-surface-area. Access for free at https://openstax.org/books/prealgebra/pages/1-introduction
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