i really need help guys

i just got the legend game recently it was good until i got stuck at peru!!!

I am stuck at the bit where i have to get three bolders and and place them on the square gaps on the for it i got 2 of them but i can see the third 1 but i dont know how to get it (the bolder i am talking about is the one at the top at the begining of that stag its got a gold thing next to it i tried every thingbut i just cant get it :( plzzzzzzzzzzzz help

i want to open that door!!!!!

You're either going to need to use the grapple topple the statue to get the boulder, or you're going to have to climb up to get it, depending on which boulder you're talking about.

I haven't played Legend for a while so I don't know the exact route you'll have to take to get the boulder if you need to climb up, but this walkthrough from Stella explains it rather well.

Climb either ladder. Jump sideways to grab the flat ledge at the figure's waist. Traverse to the center then jump straight up to grab its open mouth, then straight up again to the top of its face. Traverse back toward the ladder and jump to grab it. Climb the second section of ladder to the top and from there climb onto the head. Push the third stone sphere off the edge. Carefully climb back down the ladder. When you reach the bump in the ladder, instead of jumping over to the face, just let go; Lara will grab on again below. (Or, from the top of the statue, take a running jump over to the center statue and climb down the front of it.) Push the third sphere onto the center pressure pad to complete the puzzle.