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Extra info for NMTA Mathematics 14 Teacher Certification, 2nd Edition (XAM MTTC)
Example text
No. Once again, the sum of the angles would be more than 180o. Example 4: In a triangle, the measure of the second angle is three times the first. The third angle equals the sum of the measures of the first two angles. Find the number of degrees in each angle. Let x = the number of degrees in the first angle 3x = the number of degrees in the second angle x + 3x = the measure of the third angle Since the sum of the measures of all three angles is 180o. 5o, and 90o. Additionally, the triangle is a right triangle.
All parallelograms are rectangles. All rectangles are parallelograms. Some rhombuses are squares. Some rectangles are trapezoids. All quadrilaterals are parallelograms. Some squares are rectangles. Some parallelograms are rhombuses. True or false? True False - some parallelograms are rectangles True True False - only one pair of parallel sides False -some quadrilaterals are parallelograms False - all squares are rectangles True Example 2: In rhombus ABCD side AB = 3x - 7 and side CD = x + 15. Find the length of each side.
1,354 ends in 4, so it is divisible by 2. 240,685 ends in a 5, so it is not divisible by 2. b. A number is divisible by 3 if the sum of its digits is evenly divisible by 3. The sum of the digits of 964 is 9+6+4 = 19. Since 19 is not divisible by 3, neither is 964. The digits of 86,514 is 8+6+5+1+4 = 24. Since 24 is divisible by 3, 86,514 is also divisible by 3. c. A number is divisible by 4 if the number in its last 2 digits is evenly divisible by 4. The number 113,336 ends with the number 36 in the last 2 columns.