Use Known Angle Sizes to Determine the Sizes of Other Angles (30 , 45 , 60 , 90 , 120

GT Mathematics Curriculum

Grade 5: Unit 5

Benchmarks:

·  Identify different quadrilaterals by attribute, and know that some quadrilaterals can by classified in more than one way.

·  Use known angle sizes to determine the sizes of other angles (30˚, 45˚, 60˚, 90˚, 120˚, and 150˚).

·  Determine the perimeter and area of rectangles.

·  Identify mathematically similar polygons.

Name: ______Date: ______

Pre-Assessment

1.  Ms. Dell decides to make a garden. She has to put a fence around it to keep out the rabbits. She has 24 feet of fencing.

Using whole numbers, find as many different rectangles as you can that each have a perimeter of 24. Label the dimensions and the area of each rectangle.

GT Mathematics Curriculum

Grade 5: Unit 5

Write a geometry term dictionary for next year’s fifth graders. Be sure to include examples and illustrations. Your dictionary must include definitions for:
Acute angle, obtuse angle, right angle, equilateral triangle, scalene triangle, and isosceles triangle.
Include any additional terms you think are important for fifth graders to know. / Learn and play LogoPaths: Angle and Turn Game on the computer with a partner. / List all the types of quadrilaterals. Create a Venn Diagram to show the similarities and differences between each quadrilateral.
Combine the power polygons to create new polygons. Trace and record the letter of each polygon you used. Create at least one regular pentagon, heptagon, octagon, and decagon. / Research polygons. Determine how polygons are named. What is the largest polygon? List the names of polygons with more than 10 sides and draw examples of them. / Learn and play LogoPaths: Triangles, Rhombuses, and Parallelograms on the computer with a partner.