Page 169 - NUMINO TB_3A

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Glossary C

A Commutative Property of
acute angle (page 68, Unit 7) Multiplication (page 111, Unit 12)

An angle that is smaller than a right angle. The order in which the factors are multiplied
does not change the product.
acute triangle (page 68, Unit 7)
3 7 = 21 7 3 = 21
A triangle with 3 acute angles.
congruent (page 142, Unit 15)

Shapes that have the same size and shape.

addition (page 22, Unit 3)

The operation of finding the sum of two or
more numbers.

A.M. (page 155, Unit 16) D

The time between midnight and noon. digits (page 4, Unit 1)

angle (page 54, Unit 6) The symbols used to represent a number.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
The figure formed when 2 rays share an
division (page 118, Unit 13)
endpoint.
The operation of finding how many groups or
ray how many in each group.

vertex angle
ray
E
array (page 110, Unit 12)
equilateral triangle (page 74, Unit 8)
Objects or symbols in rows and columns.
A triangle with 3 equal sides.

3 cm 3 cm

Associative Property of 3 cm
Multiplication (page 113, Unit 12)
expanded form (page 4, Unit 1)
The grouping of factors does not change the
product. A way of writing a number with the sum of
values of digits.
(3 4) 2 = 24 3 (4 2) = 24 expanded form: 562 = 500 + 60 + 2

12 2 = 24 3 8 = 24

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