SS MG 3.7 G4.G.1Know the Draw definitions points, lines, of different line segments, s rays, angles (e.g., equilateral, (right, acute, obtuse), and isosceles, perpendicular scalene) and parallel and lines. identify dentify their these attributes. in two-dimensional figures. UNDRLYNG SKLLS AND ONS: meaning of right angle Draw riangles Key d e a o draw a, use your ruler: Mark 3 points on your paper. Make sure the 3 points are not on a line. With your ruler, draw a line segment between each pair of points. o draw a right : Mark 1 point on your paper. Mark another point straight above it. Mark the third point straight to the right of it. Draw a line segment between each pair of points. riangles are classified according to the length of the sides, or by their angles. equilateral All sides are the same length. acute All three angles are acute. < 1 turn 4 x a m p l isosceles wo sides are the same length. = turn right ontains one right angle. Draw an isosceles with a right angle. Step 1: Draw a right angle. Step 2: Since the is isosceles, make the two sides of the right angle the same length. Step 3: Draw a line from the ends of these two sides to form a. 1 4 scalene No two sides are the same length. > 1 turn 4 obtuse ontains an obtuse angle. page 296 hapter 25 Lesson 4
Draw each. 1. An equilateral 2. An obtuse scalene 3. A right scalene 4. An acute isosceles 5. A right isosceles 6. An obtuse isosceles 7. When you fold a 3-inch by 5-inch index card in half along the diagonal, you make a right scalene. 8. he sign on the right is an example of an equilateral and acute. 9. When you fold a 5-inch by 5-inch D envelope along the diagonal, you make a right isosceles. 10. Barbara has a rectangular piece of cloth that is 15 inches by 20 inches. She cut the cloth into two equal s. What kind of s were they? right scalene s? hapter 25 Lesson 4 page 297
at home! Draw each. 1. An obtuse isosceles 2. A right scalene 3. A right isosceles 4. An obtuse scalene 5. An acute isosceles 6. An equilateral 7. When you fold a 3-inch by 8-inch envelope in half along the diagonal, you make a right scalene. 8. he sail on the right is an example of a right isosceles. 9. When you fold a 6-inch by 6-inch sheet of origami paper along the diagonal, you make a right isosceles. 10. Michelle has a square piece of cloth that is 25 inches by 25 inches. She cut the cloth into two equal s. What kind of s were they? right isosceles s page 200 Home Resource and Homework hapter 25 Lesson 4
Draw each. 1. An equilateral 2. An obtuse scalene 3. A right scalene 4. An acute isosceles 5. A right isosceles 6. An obtuse isosceles 7. When you fold a 3-inch by 5-inch index card in half along the diagonal, you make a right scalene. 8. he sign on the right is an example of an equilateral and acute. 9. When you fold a 5-inch by 5-inch D envelope along the diagonal, you make a right isosceles. 10. Barbara has a rectangular piece of cloth that is 15 inches by 20 inches. She cut the cloth into two equal s. What kind of s were they? right scalene s? hapter 25 Lesson 4 Student Book age page 297
at home! Draw each. 1. An obtuse isosceles 2. A right scalene 3. A right isosceles 4. An obtuse scalene 5. An acute isosceles 6. An equilateral 7. When you fold a 3-inch by 8-inch envelope in half along the diagonal, you make a right scalene. 8. he sail on the right is an example of a right isosceles. 9. When you fold a 6-inch by 6-inch sheet of origami paper along the diagonal, you make a right isosceles. 10. Michelle has a square piece of cloth that is 25 inches by 25 inches. She cut the cloth into two equal s. What kind of s were they? right isosceles s page 200 Home Resource and Homework hapter 25 Lesson 4