Nikki's Math Post

5.) Estimate each value, to one decimal place. Check your answer with a calculator.

a) 14 b) 86 c) 136 answer a) 3.7 b) 9.3 c) 11.7

19.) Estimate 160 100. Explain how you determined your estimate.

I think that 160 100 has a square root of 400 because 4 is the square root of 16 so all you

have to do is add the zeros.

Here is a picture to show you what square roots are :)

Sorry I couldn't get the square root symbol.

Maybe you could help me and show me how to figure it out.

Victoria's Pythagoras Post

2.) Side Lengths : 7cm, 11cm, 15cm

7.)Side Lengths : 9cm, 12cm, 15cm

14.) Is It A Right Triangle ?

I did it wrong so here are the right answers :

A: Yes it is a right triangle

B: No it is not a right triangle

C: Yes it is a right triangle

D: Yes it is a right triangle

E: Yes it is a right triangle

18.) I cant figure it out so maybe you could help me out and show me how to do it ? :)

Justin's Square Root Scribe Post

Show you know:
For each number of the following, use perfect squares to estimate the square root to one decimal place.Check your answers with a calculator

a) ✔18 b) ✔23 c) ✔35


You can estimate using perfect squares to find the square root to one decimal place like this:

✔18 is in between the perfect numbers 16 and 25. ✔16=4x4 ✔18=4.__ ✔25=5x5
✔18=4.__ because if you multiply 4.__ it equals 18.

✔23 is in between the perfect numbers 16 and 25. ✔16=4x4 ✔23=4.__ ✔25=5x5
23=4.__ because if you multiply 4.__ it equals 23.

✔35 is in between the perfect numbers 25 and 36. ✔25=5x5 ✔35=5.__ ✔36=6x6
35=5.__ because if you multiply 5.__ it equals 35.

Paulo's Pythagoras Scribe Post

7) The sides of a right triangle measure 9 cm, 12 cm, and 15 cm

a) What is the area of each square attach to the three sides of the right triangle?
81 cm2 and 144cm2
b) Write an addition statement showing the relationship between the areas of the three squares?
81+144=225
c) Describe, using words and symbols, the relationship between side lengths of each square?
PLEASE HELP ME DESCRIBE THE RELATIONSHIP BETWEEN THE SIDE LENGTHS OF EACH SQUARE

14) Show weather each triangle in the table is a right triangle.

Triangle Side Lengths (cm)

A 9,12,15

B 7,8,11

C 7,24,25

D 16,30,34

E 10,11,14

Answer :

A is a right triangle :9 square + 12 square= 15 square

B is not a right triangle :7 square + 8 square= almost 11 square

C is a right triangle : 7 square + 24 square = 25 square

D is a right triangle : 16 square + 30 square= 34 square

E is a right triangle : 10 square + 11 square = almost 14 square

18) The diagram is made of two right triangles and five squares.

PLEASE HELP ME GET THE ANSWER

Glenn's Pythagoras Scribe Post

4. What are the areas of the three squared shown?
a) 30x30= 900mm

b)50x50= 2500mm

c)40x40= 1600mm

9. question .. a) Calculate the areas of three squares.

4x4= 16

2x2= 4

3x3= 9

b) Is this triangle a right angle.explain.

This is not a right triangle because 2 squared + 3 squared doesn't equal 4 squared.

12. Use the Pythagoras relationship to find the unknown area of each square.

a) 52cm square b) 676 mm square c) 65cm square d) 24cm square

17. FELLOW CLASSMATES .. can you help me answer this question, on the comment bar .. PLEASE AND THANK YOU (:

SORRY GUYS .. my spacing is messed up .. I tried editing it but it was still like this ..

Cathlene's Pythagoras Scribepost

5. A right triangle has a side lenght of 40 mm, 75 mm, and 85 mm.

a. Sketch the triangle. Draw a square on each side of the triangle.

b. What are the areas of the three squares?

c. Write an addtion statement with the areas of the three squares

10. A triangle has side lenght of 120 mm, 160 mm, and 200 mm. Is the triangle a right triangle? Explain your reasoning.

The triangle is a right angle because both the legs of the triangle is equal to the area of the hypotenuse.

Legs: Hypotenuse:

120 x 120 = 14400 200 x 200 = 40000

160 x 160 = 25600

14400 + 25600 = 40000

15. Construction workers have begun to dig a hole for a swimming pool. They want to check if the angle they have dug is 90 degrees. They measure the diagonal as shown to be 9.5 m. Is the angle 90 degrees? Explain your reasoning.

Answer: No the hole they dug is not 90 degrees.

a + b = c

6 squared + 8 squared = c

6 x 6 = 36

8 x 8 = 64

36 + 64 = 100

A right triangle has a square attached to each side. Two of the squares have areas of 10 cm and 15 cm. What are possible areas for the third square? Draw a sketch for each solution.

Sam's Pythagras Scribe post

Answers to 3, 8, 11, 16.

3. Kendra is wrong because 'p' is the hypotenuse.



8. If the triangle shown in the text book is a right angle than hypotenuse should be 60cm² because 20cm²+40cm² =60cm² .



11. a² + b² = c²

(6x6) + (5x5) = 8x8

36cm² + 25cm² = 61cm²

61cm² = 64cm²

-Since 61cm² does not equal 64cm² it is not a right triangle.


16. a² + b² = c²

(12x12) + (20x20) = c²

144cm² + 400cm² = 544cm²

√544cm² = 23.32cm

-Baldeep can be sure his box can be square by measuring the hypotenuse.