need help wit number 5 please

Question

anonymous · Answer

attachment

anonymous · Answer

@amistre64  can u help me out please i would really appreciate it

anonymous · Answer

@reno15  i need help plz

anonymous · Answer

@satellite73  can u help me its hard

anonymous · Answer

The triangle made by two sides and the diagonal has a 90° angle therefore you can use the pythagorean theorem to find the third side.

amistre64 · Answer

there are only 2 special right triangles that could be memorized ..... and a few pythag triplets as well

anonymous · Answer

how do u do  the pythagorean theorm?

anonymous · Answer

|dw:1354137553410:dw|a^2=b^2+c^2
In the square since b anc c are equal, it is 2b^2=a^2

anonymous · Answer

why are b and c =?

anonymous · Answer

Take the square root, and you get a=sqrt(2b^2)=sqrt(2)b

anonymous · Answer

b and c are the length of the sides

anonymous · Answer

so on number 5 wat u do? ders jus a 45 and a x??

anonymous · Answer

i know half of 45 is 22.5

anonymous · Answer

@ivanmlerner

anonymous · Answer

@nubeer  can u help me with number 5?

anonymous · Answer

You have both sides, since it is a square both sides are 45

anonymous · Answer

so i write x= 45 + 45?

anonymous · Answer

no, its everything squared remember the formula
$$x^2=45^2+45^2=2 \times 45^2$$

anonymous · Answer

@ivanmlerner  oh so wat u do after tht?

anonymous · Answer

Its not exacly that, you forgot the squares$$x^2=45^2+45^2$$