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LESSON PLAN

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- 1. Lesson Plan in Mathematics Grade 5 Grade V – Acacia (7:50-8:50) Molave (8:50-9:50) I. Learning Objectives Cognitive: Visualize the area of a trapezoid Find the area of a trapezoid in square metres and centimetres Psychomotor: Manipulate and measure the bases and height of a trapezoid Affective: Show enthusiasm in any given task II. Learning Content Skills: Visualizing the area of trapezoid Finding the area of trapezoid Reference: BEC-PELC III.3 Mathematics 5: Mathematics for the Better Future, Coronel And Bamba, pp. 248-251 Materials: PPT presentation, Cut-outs of trapezoidal figures with different measures of height and bases, ruler Value: Show enthusiasm in any assigned task. III. Learning Experiences A. Preparatory Activities 1. Mental Computation Have the pupils read the problem below. A triangular garden has a base of 9 meters and an altitude of 11 meters. What is the area of the garden? 2. Drill Divide the class in to 2 groups. One representative per group in every number sentence. Have the pupils stand at the center aisle at the back of the room. Have them give the value of N orally. 5 points each. The team with the most number of points wins. (2+5) x 6 = N (2+4) 5 ÷2 = N (6 +9) ÷ 2 = N (4+ 4) x 4 ÷ 2 = N
- 2. (2 + 4) x 5 ÷2 = N 3. Review Ask the pupils: 1. If the radius is given, what formula that we are going to use for finding the circumference of a circle? 2. What do we call the distance around the circle? 3. What is the formula for finding the circumference when the diameter is given? 4. Motivation What do you call this figure? Is it a quadrilateral? 6 cm 4 cm 12 cm Which is the height? Which is the upper base? Which is the lower base? B. Developmental Activities 1. Presentation Have the pupils count the square units of the trapezoids below.
- 3. Ask the pupils: How may square units cover the surface of each trapezoid? What is the area of each trapezoid? Emphasize that the area of a trapezoid is the number of square units that cover its surface. Show more examples. b. Have the pupils read the problem below. Mr. Seraspi has a trapezoidal field of palay, the bases of which are 8 meters and 12 meters. The height is 4 meters. Find the area of a trapezoidal field. 8 m 4 m 12 m What is asked in the problem? How long is the shorter base? The longer? What is the height? How do you find the area of a trapezoid? c. Show the derivation of the formula. Show how to find the area of a trapezoid. Activity. 25 pts. Group the pupils into 4. Distribute activity sheet with trapezoidal figures and with different measures of bases and height. Have them estimate the number of square units and measure the 2 bases and the height of the trapezoid. Let them find its area using the formula. A = 1 2 (b1 + b2) x h. Have the pupils show their solutions on the board.
- 4. Valuing: Did you enjoy doing the activity? What value is developed when you performed the activity? 3. Generalization What is a trapezoid? What is the formula for finding the area of a trapezoid? 4. Application 1. Which figure has a greater area, a triangle with a base of 12 m and a height of 6 m or a trapezoid with bases of 12 m and 6 m and height of 4 m? IV. Evaluation A. Find the area of the trapezoid. 5 points each. 12 m 2.6 cm 7 m 2.4 V. Assignment A. Complete the table below. Trapezoid 𝐛 𝟏 𝐛 𝟐 height Area 1 8 ? 12 160 cm2 2 2.5 6.5 4 ? 3 14 22 4 ? Prepared by: RENEL R. SITON Intern Checked: LYNARD BOBBY L. ASIRIT Critic Teacher 6m 5 cm

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