







sinA + cosA = 1 
20091106 

Nazrul pose la question : What is the solution of sinA+cosA=1 where A is an acute angle? Will A=0 degree be included in the solution? Please explain. Harley Weston lui répond. 





Is 100 degree angle an acute angle? 
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Nazrul pose la question : Is 100 degree angle an acute angle? Please explain. Here 100<90. Robert Dawson lui répond. 





Zero Angle 
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Nazrul pose la question : Is zero degree an acute angle? Please explain. Janice Cotcher lui répond. 





The angles of a triangle 
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Marissa pose la question : The angles in a triangle measure 7x1, 18x+2, and 5x+10. Determine whether the
triangle is acute, obtuse, or right. State your reasons clearly. Robert Dawson lui répond. 





Classifying a triangle 
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kevin pose la question : scalene triangle 8 ft base right side 9.5 left side 12 ft what is the angles Penny Nom lui répond. 





Determine the probability that the triangle is acute. 
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Greg pose la question : Points A1, A2, . . ., AN are equally spaced around the circumference of a
circle and N >=3. Three of these points are selected at random and a triangle
is formed using these points as its vertices. If N = 2k for some positive integer
k >= 2, determine the probability that the triangle is acute. Penny Nom lui répond. 





Can the triangle be called both an acute triangle and an equilateral triangle? 
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Jane pose la question : If all sides of a triangle are the same length and all angles are 60 degrees, can the triangle be called both an acute triangle and an equilateral triangle? Walter Whiteley lui répond. 





Third side of Acute Triangle 
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Don pose la question : I gave this problem to my children, 9th and 12th grade and they are not(me too!) sure of the answer. I am trying to determine the length of the third side of an acute triangle. I know two of the lengths but I do not know the angles. Is there a proper formula to use to find the length of the third side? Thank you. Chris Fisher and Penny Nom lui répond. 





An acute scalene triangle 
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Kim pose la question : Hi I'm on a missionI'm suppose to have a group of children write up a hypotheses about the altitudes and angle biscetors of the follwing 3 types of triangleequilateral, isosceles and acute scalene triangle. Is there such a thing as a acute scalene triangle and why or why not. Chris Fisher lui répond. 

