diff --git a/js/common/view/TriangleNode.js b/js/common/view/TriangleNode.js
index 9c7a71bf2..ff185741d 100644
--- a/js/common/view/TriangleNode.js
+++ b/js/common/view/TriangleNode.js
@@ -5,47 +5,44 @@
  *
  * @author Sam Reid (PhET Interactive Simulations)
  */
-define( require => {
-  'use strict';
-
-  // modules
-  const inherit = require( 'PHET_CORE/inherit' );
-  const Matrix3 = require( 'DOT/Matrix3' );
-  const merge = require( 'PHET_CORE/merge' );
-  const Path = require( 'SCENERY/nodes/Path' );
-  const proportionPlayground = require( 'PROPORTION_PLAYGROUND/proportionPlayground' );
-  const Shape = require( 'KITE/Shape' );
-  const Side = require( 'PROPORTION_PLAYGROUND/common/model/Side' );
-
-  // constants
-  const TRIANGLE_LENGTH = 17;
-  const TRIANGLE_ALTITUDE = 10;
-  const LEFT_TRIANGLE_SHAPE = new Shape().moveTo( 0, 0 )
-    .lineTo( TRIANGLE_ALTITUDE, TRIANGLE_LENGTH / 2 )
-    .lineTo( 0, TRIANGLE_LENGTH )
-    .lineTo( 0, 0 );
-  const RIGHT_TRIANGLE_SHAPE = LEFT_TRIANGLE_SHAPE.transformed( Matrix3.scaling( -1, 1 ) );
-
-  /**
-   * @constructor
-   * @extends {Path}
-   *
-   * @param {Side} side - Side.LEFT or Side.RIGHT
-   * @param {Object} [options]
-   */
-  function TriangleNode( side, options ) {
-    assert && assert( Side.isSide( side ), 'Side should be Side.LEFT or Side.RIGHT' );
-
-    // defaults
-    options = merge( {
-      stroke: 'black',
-      lineWidth: 1
-    }, options );
-
-    Path.call( this, side === Side.LEFT ? LEFT_TRIANGLE_SHAPE : RIGHT_TRIANGLE_SHAPE, options );
-  }
-
-  proportionPlayground.register( 'TriangleNode', TriangleNode );
-
-  return inherit( Path, TriangleNode );
-} );
+
+import Matrix3 from '../../../../dot/js/Matrix3.js';
+import Shape from '../../../../kite/js/Shape.js';
+import inherit from '../../../../phet-core/js/inherit.js';
+import merge from '../../../../phet-core/js/merge.js';
+import Path from '../../../../scenery/js/nodes/Path.js';
+import proportionPlayground from '../../proportionPlayground.js';
+import Side from '../model/Side.js';
+
+// constants
+const TRIANGLE_LENGTH = 17;
+const TRIANGLE_ALTITUDE = 10;
+const LEFT_TRIANGLE_SHAPE = new Shape().moveTo( 0, 0 )
+  .lineTo( TRIANGLE_ALTITUDE, TRIANGLE_LENGTH / 2 )
+  .lineTo( 0, TRIANGLE_LENGTH )
+  .lineTo( 0, 0 );
+const RIGHT_TRIANGLE_SHAPE = LEFT_TRIANGLE_SHAPE.transformed( Matrix3.scaling( -1, 1 ) );
+
+/**
+ * @constructor
+ * @extends {Path}
+ *
+ * @param {Side} side - Side.LEFT or Side.RIGHT
+ * @param {Object} [options]
+ */
+function TriangleNode( side, options ) {
+  assert && assert( Side.isSide( side ), 'Side should be Side.LEFT or Side.RIGHT' );
+
+  // defaults
+  options = merge( {
+    stroke: 'black',
+    lineWidth: 1
+  }, options );
+
+  Path.call( this, side === Side.LEFT ? LEFT_TRIANGLE_SHAPE : RIGHT_TRIANGLE_SHAPE, options );
+}
+
+proportionPlayground.register( 'TriangleNode', TriangleNode );
+
+inherit( Path, TriangleNode );
+export default TriangleNode;
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